Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3cd441e38795a9f…

MALICIOUS

PDF

85.6 KB Created: 2021-01-19 16:51:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 89fd2d81cebb948f159ecd02dce556c3 SHA-1: 6ebcc57e44c2458a496b7f370ae967f578d4292e SHA-256: b3cd441e38795a9f709a3a5713e41a9f8bff05e4e720a76d8b19eec6cb89c429
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious sites. The presence of a URL with 'utm_term=adobe+acrobat+standard+2017++version' suggests a lure related to software, possibly a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9612

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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 https://maypoin.ru/aws?utm_term=adobe+acrobat+standard+2017++version PDF link annotation
    • https://site-1180237.mozfiles.com/files/1180237/lesenamugetoluro.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefimex/DD1UihK/battlelands_royale_online_spielen.pdfIn PDF document text
    • https://site-1167942.mozfiles.com/files/1167942/96105097531.pdfIn PDF document text
    • https://cdn.sqhk.co/penomufepuk/hhjjssk/rebapoku.pdfIn PDF document text
    • https://cdn.sqhk.co/jazepoxamib/ifo0WEP/76727258244.pdfIn PDF document text
    • https://site-1171608.mozfiles.com/files/1171608/video_apple_tv.pdfIn PDF document text
    • https://cdn.sqhk.co/lokijuzim/jifgeid/dozoper.pdfIn PDF document text
    • https://cdn.sqhk.co/sivefuxonix/dRFggij/truck_driver_3d_offroad_game_download_uptodown.pdfIn PDF document text
    • https://site-1168114.mozfiles.com/files/1168114/mitemolinuxonup.pdfIn PDF document text
    • https://cdn.sqhk.co/letojeka/gf1acE8/clumsy_cat_game_online.pdfIn PDF document text
    • https://cdn.sqhk.co/rifokinimito/4rujahf/40204818753.pdfIn PDF document text
    • https://site-1224402.mozfiles.com/files/1224402/download_a_tag_knight_mod_apk_unlimited_money.pdfIn PDF document text
    • https://site-1178227.mozfiles.com/files/1178227/debukelosoxem.pdfIn PDF document text
    • https://luzatewuxajexi.weebly.com/uploads/1/3/4/2/134265782/figonapu_fobitu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/tekusip.pdfIn PDF document text
    • https://s3.amazonaws.com/wanalovum/59214897321.pdfIn PDF document text
    • https://s3.amazonaws.com/golepe/foten.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/a4_lever_arch_file_spine_label_template.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000130ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130EA 5284 bytes
SHA-256: 980b43aed6da840b5434b044f9f607146164000fe72c6bd018a42fe61212c94d

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