Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf9d65758f34d0cd…

MALICIOUS

PDF

128.3 KB Created: 2022-07-25 12:38:08 +00:00 Authoring application: goldlau (via PDF Master 1.0.1) First seen: 2024-01-08
MD5: 6a621e0ac10036b9f3ec14510610df36 SHA-1: ff2ddedb9bd123aecea1aa6804b22ef7ad2454a4 SHA-256: bf9d65758f34d0cd339df643403ad98c2d8733838cced617ad9ff33a63200541
334 Risk Score

Machine Learning

  • Nyx PDF Classifier clean score 0.0006

Heuristics 9

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Cracked-software lure uses shortlink/download gateway critical PDF_CRACKED_SOFTWARE_SHORTLINK_LURE
    PDF visible text advertises a crack, serial number, archive, or pirated-software download and pairs it with a shortlink or encoded download gateway. This is a high-confidence social-engineering carrier for unwanted software or droppers; the PDF itself is not a parser exploit.
  • Travel-support phone-number stuffing scam critical SE_TRAVEL_SUPPORT_PHONE_SCAM
    Document repeats phone numbers in airline/travel/refund/support language, often across multiple regional phrasings. This matches SEO/support-scam PDFs that impersonate airlines or travel brands and route users to attacker-controlled call centers rather than a normal travel document.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Cracked-software lure uses download-gateway redirectors high PDF_CRACKED_SOFTWARE_REDIRECTOR_LINK_FARM
    PDF contains multiple cracked-software/keygen/serial-key lure links together with long encoded download-gateway URLs or known crack-download redirector hosts. This is stronger than generic piracy vocabulary: the document is an SEO lure that funnels users through redirect/download infrastructure commonly used for adware, unwanted software, or droppers.
  • PDF links to a cracked-software download doorway (base64-obfuscated) high PDF_CRACKED_SOFTWARE_DOWNLOAD_DOORWAY
    PDF's embedded link hides a pirated-software title as a base64 blob inside the URL path/query (and/or carries the ``download|`` doorway-template marker), rather than in visible text. This is a TCPDF-generated SEO doorway that ranks for software-piracy searches and funnels users to fake 'crack/keygen' download pages distributing adware, potentially-unwanted programs, or droppers. The base64 encoding is deliberate obfuscation to evade plaintext lure rules; the PDF itself carries no parser exploit — the risk is the linked crack-download destination.
  • PDF link farm advertises cracked/pirated software medium PDF_CRACKED_SOFTWARE_LURE
    PDF contains many clickable links whose targets use cracked-software, keygen, serial-key, or warez vocabulary. These are SEO-spam lure documents that rank for software-piracy searches and route users to fake 'crack' download pages distributing potentially-unwanted programs, adware, or droppers. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://xtraserp.com/peasant/braingymclasses.ZG93bmxvYWR8VGw3Wm5Gd1lYeDhNVFkxT0RJeE9EazROWHg4TWpVNU1IeDhLRTBwSUZkdmNtUndjbVZ6Y3lCYldFMU1VbEJESUZZeUlGQkVSbDA?assist/RnNwYXNzZW5nZXJzIENyYWNrIEJ5IEtvbXUgMTkRnN/circularity PDF link annotation
    • https://mohacsihasznos.hu/advert/beatmania-iidx-16-empress-iso-link/In PDF document text
    • https://blackbusinessdirectories.com/wp-content/uploads/2022/07/acryanplayonhdfirmwaredownload.pdfIn PDF document text
    • https://superstitionsar.org/a-werewolf-boy-korean-movie-eng-sub-torrent-_top_-download/In PDF document text
    • https://sweetkids.by/bez-rubriki/watchmen-ae-1-temporada-torrent-ae-2019-dual-audio-legendado-web-dl-720p-e-1080p-ae-download-full/In PDF document text
    • https://volektravel.com/font-psl-kanda-modern-extra-14/In PDF document text
    • http://www.b3llaphotographyblog.com/cs-1-6-admin-hack-v3-0-1/In PDF document text
    • https://my-study.cz/wp-content/uploads/2022/07/Xpadder_profile_for_Call_of_Duty_Modern_Warfare_3_updated.pdfIn PDF document text
    • https://africantoursguide.com/hacked-server-plugin-minecraft/In PDF document text
    • https://travelsarkar.com/wp-content/uploads/2022/07/houswagn.pdfIn PDF document text
    • https://www.georgiacannabis.org/wp-content/uploads/2022/07/Software_Pembobol_Wifi_For_Windows_7_PATCHED.pdfIn PDF document text
    • https://www.theblender.it/x-force-keygen-stingray-2016-portable-__hot__/In PDF document text
    • https://movingservices.us/index.php/2022/07/25/hd-online-player-detective-byomkesh-bakshy-movie-kickass-720p-or-1080p/In PDF document text
    • https://enricmcatala.com/donde-descargar-el-video-completo-la-jefa-sonia-rox/In PDF document text
    • https://wanoengineeringsystems.com/nod-username-and-password/In PDF document text
    • https://aapanobadi.com/2022/07/25/labyrinth-of-touhou-cheat-engine-download-__full__/In PDF document text
    • https://azizeshop.com/wp-content/uploads/2022/07/TransMac_119_Extra_Quality_Crack.pdfIn PDF document text
    • https://blessedtimony.com/wp-content/uploads/2022/07/Mis_500_Locos_Antonio_Zaglul_Pdf_TOP_Download.pdfIn PDF document text
    • https://www.bywegener.dk/wp-content/uploads/2022/07/We_The_People_Eleventh_Essentials_Edition_Book_Pdf_BEST.pdfIn PDF document text
    • https://coreelevation.com/2022/07/25/fast-and-furious-7-full-verified-movie-in-hindi-hd-1080p-kickasstor/In PDF document text
    • https://ayusya.in/como-calibrar-el-laser-de-un-ps2-slim-hot/In PDF document text
    • https://blackbusinessdirectories.com/wp-In PDF document text
    • https://sweetkids.by/bez-rubriki/watchmen-ae-1-temporada-torrent-ae-2019-dual-audio-legendado-web-In PDF document text
    • https://my-study.cz/wp-In PDF document text
    • https://www.georgiacannabis.org/wp-In PDF document text
    • https://movingservices.us/index.php/2022/07/25/hd-online-player-detective-byomkesh-bakshy-movie-In PDF document text
    • https://blessedtimony.com/wp-In PDF document text
    • https://www.bywegener.dk/wp-In PDF document text
    • https://coreelevation.com/2022/07/25/fast-and-furious-7-full-verified-movie-in-hindi-hd-1080p-In PDF document text
    • http://xtraserp.com/peasant/braingymclasses.zg93bmxvywr8vgw3wm5gd1lyedhnvfkxt0rjee9eazrowhg4twpvnu1iedhlrtbwsuzkdmntundjbvz6y3lcyldfmu1vbejesuzzeulgqkvsbda?assist/rnnwyxnzzw5nzxjzienyywnriej5ietvbxugmtkrnn/circularityIn PDF document text
    • https://azizeshop.com/wp-content/uploads/2022/07/transmac_119_extra_quality_crack.pdfIn PDF document text
    • http://www.tcpdf.orgIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://www.aiim.org/pdfa/ns/extension/In PDF document text
    • http://www.aiim.org/pdfa/ns/schema#In PDF document text
    • http://www.aiim.org/pdfa/ns/property#In PDF document text
    • http://www.aiim.org/pdfa/ns/id/In PDF document text
🗂 Part of campaign: secureserver.net 1471 samples

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4825 84508 bytes
SHA-256: 2b7ba551bea82cc3307397981c1dbeb1b78486f95f2eb14e5e58d4e1b24edb0c
font_01_sfnt_off0000d011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD011 83036 bytes
SHA-256: 6d13e73e85a502a13969f6a5eaecd0b275a0868c045f80b7d64ed55d70678261