Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f33e457f34639c7…

MALICIOUS

PDF

110.7 KB Created: 2022-09-09 22:52:54 +00:00 Authoring application: hakmari (via PDF Master 1.0.1) First seen: 2026-05-03
MD5: 4b81a18ac75fb7d9219ad0e87f3203a7 SHA-1: 56308049bc53a54f1696dac28f3bf3d80a7df297 SHA-256: 5f33e457f34639c717a6ce11703b033117e25912283ebf822c9f79b169dc8c94
304 Risk Score

Machine Learning

  • Nyx PDF Classifier clean score 0.0015

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.
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. 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://hardlyfind.com/ZG93bmxvYWR8NlhWWkhaNE1ueDhNVFkyTWpZNE1ETTVNSHg4TWpVNU1IeDhLRTBwSUZkdmNtUndjbVZ6Y3lCYldFMU1VbEJESUZZeUlGQkVSbDA/fleischers/conglomerate.medicaments.RmF5ZXogU2FpZGF3aSBFZ3lwdGlhbiBOZXkgVG9ycmVudARmF..cleartouch PDF link annotation
    • http://www.theoldgeneralstorehwy27.com/malwarebytes-premium-3-8-3-2965-build-11302-crack-keygen-patched-lifetime/In PDF document text
    • https://www.publishing.wang/archives/16926In PDF document text
    • http://infoimmosn.com/?p=47109In PDF document text
    • https://xtc-hair.com/x-force-keygen-upd-eye-candy-7-20/In PDF document text
    • https://polydraincivils.com/wp-content/uploads/2022/09/naylsaly.pdfIn PDF document text
    • http://www.cxyroad.com/wp-content/uploads/2022/09/Adobe_Photoshop_Lightroom_CC_2018_1185_Crack_utorrent.pdfIn PDF document text
    • http://www.diarioelsoldecusco.com/advert/kandel-principi-di-neuroscienze-ebook-download-best/In PDF document text
    • http://yotop.ru/2022/09/10/download-hot-ebook-purpose-driven-life-bahasa-indonesian/In PDF document text
    • https://www.sensoragencia.com/wp-content/uploads/2022/09/Abbyy_Flexicapture_10_Full_HOT_Crack.pdfIn PDF document text
    • http://www.b3llaphotographyblog.com/sonic-vs-lf2-1-1-download-link/In PDF document text
    • https://turn-key.consulting/2022/09/09/finding-dory-english-2-telugu-movie-download-work/In PDF document text
    • https://xn--traspasoenespaa-crb.com/wp-content/uploads/2022/09/crysis_2_crack_windows_7_64_bit.pdfIn PDF document text
    • https://villa-mette.com/wp-content/uploads/2022/09/SQL_Server_2017_Torrent.pdfIn PDF document text
    • https://vietnammototours.com/wp-content/uploads/2022/09/bethfeat.pdfIn PDF document text
    • http://jameschangcpa.com/advert/setup-1c-bin-call-of-duty-modern-warfare-2-rar/In PDF document text
    • https://chronicpadres.com/cevdetacareelektrikdevrelerininanalizipdf12-better/In PDF document text
    • https://josebonato.com/fisicoquimicaraymondchangdescargargratis-upd/In PDF document text
    • https://trijimitraperkasa.com/smartplant-license-manager-keygen-generatorl-new/In PDF document text
    • http://newsseva.in?p=34958In PDF document text
    • https://afribizkid.africa/wp-content/uploads/2022/09/vysdea-1.pdfIn PDF document text
    • http://www.theoldgeneralstorehwy27.com/malwarebytes-premium-3-8-3-2965-build-11302-crack-keygen-In PDF document text
    • http://www.cxyroad.com/wp-In PDF document text
    • http://hardlyfind.com/zg93bmxvywr8nlhwwkhane1uedhnvfkytwpzne1ettvnshg4twpvnu1iedhlrtbwsuzkdmntundjbvz6y3lcyldfmu1vbejesuzzeulgqkvsbda/fleischers/conglomerate.medicaments.rmf5zxogu2fpzgf3asbfz3lwdglhbibozxkgvg9ycmvudarmf..cleartouchIn PDF document text
    • http://www.cxyroad.com/wp-content/uploads/2022/09/adobe_photoshop_lightroom_cc_2018_1185_crack_utorrent.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_off00000c76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC76 84508 bytes
SHA-256: 2b7ba551bea82cc3307397981c1dbeb1b78486f95f2eb14e5e58d4e1b24edb0c
font_01_sfnt_off00009462.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9462 83036 bytes
SHA-256: 6d13e73e85a502a13969f6a5eaecd0b275a0868c045f80b7d64ed55d70678261