Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc92149f2da3f976…

MALICIOUS

PDF

76.4 KB Created: 2021-05-24 20:05:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 39cc76bd75fd1210c502ac7646cd8261 SHA-1: d894c1759567e3f9b3d8fc24646700e22a7ca554 SHA-256: bc92149f2da3f97619ffb24973160a94aa39cd3048342e20ece357d89414b877
156 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 0.9998

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084f4b711a0a---numenipigolajixofuranil.pdf In PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/94vmrf9ls4eadevd5po7kg91fi/fifedawuxize.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ddfd4dacd4---84432825550.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/2a35f4771a5a5e8c419097956ac8b57c/17237378196.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/pasirijoji.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/p2f7kqg34m9fcs0bogvmbip5ki/77420230849.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/160707cfb3d86d---xifelejopejigadir.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1f530deaaf---22696855846.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080b57de5f2b---lovulukafawoxu.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/dsqlif0834rv163783hc9d1ftg/dimoleloxoxeresarawelib.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/16070f7a7e5fc4---pidufodurelofozofubedis.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609b081ff1bdf---dafusufuridorerejukimur.pdfIn PDF document text
    • https://www.elitelawnsolutions.co.uk/wp-content/plugins/super-forms/uploads/php/files/do454v9jaukto9a0ldbbeusvpp/75519565213.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a86a5c9cbaa---dililomave.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/l8md9ba9q2j3th8qmlmhb7nau1/rebukixemema.pdfIn PDF document text
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/a46a799a3a9d9ebd5ff43d723bb3c57d/remixet.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607759657af24---vebipipalanabifudanojuwu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=%25D1%2581%25D0%25BA%25D0%25B0%25D1%2587%25D0%25B0%25D1%2582%25D1%258C+%25D1%2580%25D0%25B8%25D0%25BD%25D0%25B3%25D1%2582%25D0%25BE%25D0%25BD+%25D0%25BA%25D0%25B0%25D0%25BA+%25D0%25BD%25D0%25B0%25D0%25BC+%25D0%25B4%25D1%2580%25D1%2583%25D0%25B3+%25D0%25B1%25D0%25B5%25D0%25B7+%25D0%25B4%25D1%2580%25D1%2583%25D0%25B3%25D0%25B0+%25D0%25BF%25D1%2580%25D0%25BE%25D0%25B6%25D0%25B8%25D1%2582%25D1%258C+%25D0%25B8+%25D0%25B4%25D0%25BD%25D1%258FIn 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/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=%25D1%2581%25D0%25BA%25D0%25B0%25D1%2587%25D0%25B0%25D1%2582%25D1%258C+%25D1%2580%25D0%25B8%25D0%25BD%25D0%25B3%25D1%2582%25D0%25BE%25D0%25BD+%25D0%25BA%25D0%25B0%25D0%25BA+%25D0%25BD%25D0%25B0%25D0%25BC+%25D0%25B4%25D1%2580%25D1%2583%25D0%25B3+%25D0%25B1%25D0%25B5%25D0%25B7+%25D0%25B4%25D1%2580%25D1%2583%25D0%25B3%25D0%25B0+%25D0%25BF%25D1%2580%25D0%25BE%25D0%25B6%25D0%25B8%25D1%2582%25D1%258C+%25D0%25B8+%25D0%25B4%25D0%2PDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFA8 5448 bytes
SHA-256: 14e0032f8ef4434671bfc36779f0ebc815b69480fc3b116990bfba17051f0ea6
font_01_sfnt_off0000e268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE268 15720 bytes
SHA-256: ac1c6ed05eb6999a3d26e53d1266c9a58b4df711c0b746b6249eadea0a1bf4e7
font_02_sfnt_off00011270.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11270 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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