Malicious PDF — malware analysis report

Static analysis result for SHA-256 d601928d2a6153ef…

MALICIOUS

PDF

80.7 KB Created: 2021-09-11 09:50:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 08a47b7c685d1b0eedcf69d390251a21 SHA-1: c3f28d016c0fc4f466f4254e29785bfdf60e2e06 SHA-256: d601928d2a6153ef5d8de93c58ef881b560ae725fdc8ee81d05e41de506228b6
156 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm or phishing lure. The presence of these links suggests the PDF is intended to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/9f9f20a04883a681ab6f702368830439/11776835180.pdf In PDF document text
    • http://shiny-baby.com/fileimage/file/wapitewunetepuwelu.pdfIn PDF document text
    • https://haysalon.com/public_html/userfiles/file/fasebikixenovit.pdfIn PDF document text
    • https://golf-tout-terrain.com/publish/page/file/85080322993.pdfIn PDF document text
    • https://cosanuesa.com/componentes/editor/ckfinder/userfiles/files/60810234697.pdfIn PDF document text
    • https://osakaav.com/userfiles/files/xanunojimafelamatitug.pdfIn PDF document text
    • https://securitydm.eu/slicice/file/45754028833.pdfIn PDF document text
    • https://baobiachau.com/luutru/files/giwiduzuzakekeduwixetuja.pdfIn PDF document text
    • http://cobe-ing.it/userfiles/files/borezakuse.pdfIn PDF document text
    • http://apsons.eu/files/file/fijobopuvawotifanoxuw.pdfIn PDF document text
    • http://sage-chem.com/image/files/20210904_215202.pdfIn PDF document text
    • http://xn----7sbicwad4afgcgd5aph7d5e.xn--p1ai/ckfinder/userfiles/files/kolesonaxazikibowizafis.pdfIn PDF document text
    • http://vtdsbinhthuan.vn/public/uploads/userfiles/file/femuxanuzikolovotonis.pdfIn PDF document text
    • http://www.ciesol.es/ckfinder/userfiles/files/vegijopovepifekuponepet.pdfIn PDF document text
    • http://markjfox.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bovad.pdfIn PDF document text
    • http://cheniou.handysociality.com/upload/files/fuveregemif.pdfIn PDF document text
    • https://worldpigment.com/image/upload/File/katafadifakin.pdfIn PDF document text
    • https://www.sistemkabin.com/ckfinder/userfiles/files/49117593215.pdfIn PDF document text
    • http://tareeapartment.com/user_img/files/18462288636.pdfIn PDF document text
    • http://peak-experience-japan.com/images/blog/file/48714968532.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/8d520cfd42396b5a7a4ec186b9c6a852/29103243984.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161388e4eedb12---53315199860.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16131c9a055ec5---beribipefufurubi.pdfIn PDF document text
    • http://klwas.org/userfiles/images/file/44236439346.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+connect+pendrive+to+mobile+with+otg+cablePDF link annotation
    • 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d491.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD491 11076 bytes
SHA-256: eabc4b6b0ce7c2b9c502c975f2c938bbf0da08dabeb2328b28deb8a98bcce7e3
font_01_sfnt_off0000edb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB1 18244 bytes
SHA-256: bb6a4661016b1a6abe63a61a38fedeaa2755353829ad2f6daecae20837a07970
font_02_sfnt_off00011ca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CA0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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