Malicious PDF — malware analysis report

Static analysis result for SHA-256 634db8639496a52d…

MALICIOUS

PDF

77.3 KB Created: 2022-06-10 10:47:14 +02:00 Authoring application: cantapa (via PDF Master 1.0.1) First seen: 2026-04-29
MD5: 9159640ca51d7a86fb319b029a4c313a SHA-1: 303d46eb4a986551286429de2c31a263380372d6 SHA-256: 634db8639496a52d5ea3bf25801008d0bb6904c133f327b84be378d62e71ab30
234 Risk Score

Machine Learning

  • Nyx PDF Classifier clean score 0.0090

Heuristics 7

  • 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.
  • 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://evacdir.com/T3MgMyBOaW5qYXMgQ29udHJhIEF0YWNhbSBEdWJsYWRvIERvd25sb2FkT3M/extractions/incubates.pinscher/doubtful.ravinelli/recdeck/ZG93bmxvYWR8NlZ0YWpFM2ZId3hOalUwTnpnd09UUXlmSHd5TlRrd2ZId29UU2tnVjI5eVpIQnlaWE56SUZ0WVRVeFNVRU1nVmpJZ1VFUkdYUQ.cymbalta PDF link annotation
    • https://www.beaches-lakesides.com/realestate/sethupathi-2016dvdscr-x264-400mbsethupathi-2016dvdscr-x264-400mb/In PDF document text
    • https://debit-insider.com/wp-content/uploads/2022/06/EM_Client_72361640_Pro_Crack_Activation_Key_Download_REPACK.pdfIn PDF document text
    • https://feriavirtualcampestre.site/advert/insidious-the-last-key-english-the-man-movie-download-torrent-full/In PDF document text
    • https://apolloinstitute.com.au/moodle/blog/index.php?entryid=1270In PDF document text
    • https://www.goleisureholidays.com/wp-content/uploads/2022/06/Tinkerbell_The_Secret_Of_The_Wings_Full_Movie_In_Hindi_Daily.pdfIn PDF document text
    • https://jobavenue.net/?p=9547In PDF document text
    • http://crochetaddicts.com/upload/files/2022/06/CrdEIou9HEDr65eNK794_10_1f9a75ec6b2ba0294077e5d886774562_file.pdfIn PDF document text
    • https://cycloneispinmop.com/?p=13364In PDF document text
    • http://itkursove.bg/wp-content/uploads/2022/06/Les_codes_gshare_activation_et_permanently.pdfIn PDF document text
    • https://arlingtonliquorpackagestore.com/wp-content/uploads/2022/06/dirk_piano_tuner_v4_0_cracked.pdfIn PDF document text
    • https://debit-insider.com/wp-In PDF document text
    • https://www.goleisureholidays.com/wp-In PDF document text
    • http://evacdir.com/t3mgmyboaw5qyxmgq29udhjhief0ywnhbsbedwjsywrviervd25sb2fkt3m/extractions/incubates.pinscher/doubtful.ravinelli/recdeck/zg93bmxvywr8nlz0ywpfm2zid3hoaluwtnpnd09uuxlmshd5tlrrd2zid29uu2tnvji5evpiqnlawe56suz0wvrvefnvru1nvmpjz1vfukdyuq.cymbaltaIn 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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00001376.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1376 120140 bytes
SHA-256: a217f12862e0ff75203bdd4136ca0d68471050be46bb09aed5306898926ffdd4