Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b157324ff084895…

MALICIOUS

PDF

62.5 KB Created: 2021-06-21 06:58:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 76aa55b3c94af77bfd18f1da4b23bf80 SHA-1: 59b2886449533519eac661b65e350b5f11efb3bc SHA-256: 8b157324ff084895cb09c9ce2af3f4c167d18b7d3b152e5144a5c33a46fc89ee
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 0.6388

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 http://gleneaglehoa.org/images/file/66639858545.pdf In PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e539cdeb40---mipokamurikepukatigilub.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/8e971131ca84c0365aa27df2e874cb73/pagakozopapejo.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086bf6299fad---tewufufozul.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f6dc82a00d---pelorutugoxuxavowonaw.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff5540a9ce---rodesub.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608ecc54c896f---wiwokebotubebined.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/evq9vda8ce2olicran6mksrg0e/bixef.pdfIn PDF document text
    • http://aristosaigonhotel.com/uploads/files/zuzedodugeguwunuve.pdfIn PDF document text
    • https://watertorens.nluserfiles/file/64741528485.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/e370ef5c642157f8b9f79a258a777cd1/98680445226.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/716ba8afc5d1769bd14e64afa03a1ab7/46009774428.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/9326f5a585b1c00207ce7217efeda4c6/93841090954.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/cb87dd8a0b9ebaa75c61624a3b7c9866/35070626711.pdfIn PDF document text
    • https://rmp-traueranzeigen.de/cms/files/23502727236.pdfIn PDF document text
    • https://aulacvn.com/upload/fck/file/18177773718.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=aaranya+kaandam+uncut+telegramPDF 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_off0000bd03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD03 5236 bytes
SHA-256: 12d8af1388dea50b8ebe5c7d69d5455f21c0c4ac12118afc126fd5075f6665a6
font_01_sfnt_off0000cec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEC5 1716 bytes
SHA-256: d0f49cc195c1bf31025e9f0e2a1c0016543c567966f58b7536460b272fcd7c9a
font_02_sfnt_off0000d750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD750 10968 bytes
SHA-256: d14869a6961b1ca6ad1ee1e3241ac57013bfebe6bae3458e2264dea0f9ffa1bf

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