Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3a9bb268be8a1d3…

MALICIOUS

PDF

80.4 KB Created: 2021-06-10 13:29:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 22971d2e9fc38532acfa7b6f9fcce8d4 SHA-1: 13dd11391ea6c2208fd5101127663c5c79144524 SHA-256: f3a9bb268be8a1d3d3efa94027a17cdad8feb6c7b1a5bc69b06cfb65f5e77b76
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9288

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. 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 https://inwebjor.ru/uplcv?utm_term=see+deleted+texts+android PDF link annotation
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/u41v187nsc0r8d7cdtjtthjcu0/26469819829.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/auka5251v69rjqf4lvfhoorr01/sunaxunedapo.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d08818c2a3---87526809851.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/201820196919.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609d94ef73ab1---bozofowatebawiwabure.pdfIn PDF document text
    • http://hccc252.ca/clients/e/e4/e484b38507f190a955b66748903449e1/File/47603929953.pdfIn PDF document text
    • http://kameleonhastanc.hu/files/file/27413347477.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff823c4fca---39438075391.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16094c8386449d---jemilif.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/72267ac1af18047d5a2d53a1e42aa035/gamevazijamaropilojav.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/dk24s8h39s1lbp8mkdkrttv3b0/55923978919.pdfIn PDF document text
    • http://razaviota.ir/basefile/razaviotair/files/949202959.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/s016kkkjtvf2tpjcrkavcenuhe/gutopenoto.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/mipininapufevevelax.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/v61bcgengm1itjoeut0qb9n107/82524274502.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C0 2964 bytes
SHA-256: 84fa35b31b5b4531fee5fa4c1c411ab0cb21520993f5754df23e45a807008900
font_01_sfnt_off00010150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10150 4780 bytes
SHA-256: d0d38a8ca54bb82d7006c6eea5ba7d0e7364ee86e37961ff1b8a321cdc5af7ae
font_02_sfnt_off0001118c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1118C 11564 bytes
SHA-256: f701e44c66cffd5a27ea3cb20f63186f688dc1fcadb51ce8071b2fc051bfadda

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