Malicious PDF — malware analysis report

Static analysis result for SHA-256 facedb5d89e25f39…

MALICIOUS

PDF

71.4 KB Created: 2021-08-20 22:09:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d85cbcb4e4670ef2651f27b950e6fc0e SHA-1: b2d082077efe974e2b2344012548b923f2c46c0c SHA-256: facedb5d89e25f39a1d8e222eed3e9f65f3a972d4397a3ca64bcf0ef6255c5c8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier further support its malicious nature. No scripts were extracted, and the document body was unreadable, limiting the analysis of specific attack vectors beyond the link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8269

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://daming-school.com/userfiles/file/lirovab.pdf In PDF document text
    • https://aspirans.com/files/file/17434698674.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/taeeqog69is5leue8ntc0f9fvi/lewizidesezopijesoxu.pdfIn PDF document text
    • https://mountmoriahcamp.com/media/19297419987.pdfIn PDF document text
    • http://szentimresiklos.hu/upload/file/69958008288.pdfIn PDF document text
    • http://studioambienteterritorio.it/userfiles/files/20000455746.pdfIn PDF document text
    • http://capitaloffice.pl/fotki/file/webegiwik.pdfIn PDF document text
    • http://ahkkpcm.org/userfiles/71412195611.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f75a498b7b0---tavuxajexezijuvuzu.pdfIn PDF document text
    • http://poexali.org/static/image/_u/system/files/84752932208.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb3cd42752---garepofifetinipipole.pdfIn PDF document text
    • http://china-engine.net/ckfinder/userfiles/files/rojufugalamidiwuno.pdfIn PDF document text
    • https://grancom.by/upload/docs/jugidewigosefilalevuxizo.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/n2ehjdd7il5tkmmbcknd01qtvd/dirapuvutupe.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b477b2ba7cd---pufenituv.pdfIn PDF document text
    • http://sanfrancescovet.com/userfiles/files/62770754918.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/1hn90cc1cn43ge83kmebt9uh4c/13949223921.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608041027e82b---famijesetajero.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/vg40m9df64u56j08ruhtookp35/99476915850.pdfIn PDF document text
    • https://phr4u.com/files/53204057878.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/bb7d1f4fff134018dc3bd36959e5df13/25850613826.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/vd6gk0bh0gnd26otb6jai0u02r/32870255405.pdfIn PDF document text
    • https://elnativocoffee.com/silver/upload/files/44985435608.pdfIn PDF document text
    • http://promador.pl/userfiles/file/59926096175.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=pdf+compressor+free+download+filehippoPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC0B 10876 bytes
SHA-256: ea9ce33a824812b8402933e51210105362bdf0fd77442ba9c8c4848530475161
font_01_sfnt_off0000f4fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FA 16644 bytes
SHA-256: 682a0d9db281cc0aa1581a99e5aba3a28a1d2c9779b3182e8f5a12861fce8e1c

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