Malicious PDF — malware analysis report

Static analysis result for SHA-256 a02395bdd9a77d6c…

MALICIOUS

PDF

84.2 KB Created: 2021-06-09 09:42:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: fcbdf3ecd3d0818992bf81d1408f2e6e SHA-1: 383018ce95758d0e25c4e76cad3d313f5e28dc15 SHA-256: a02395bdd9a77d6cb7045bf75a3838ce199c06bc76c49b75b898cc1384566034
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing campaigns that leverage search engine optimization tactics to attract victims.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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
  • 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://wastran.ru/uplcv?utm_term=bangalore+days+malayalam+movie+download+jio+rockers PDF link annotation
    • http://bainihu.com/upfiles/editor/files/lovodijukafevewojasovim.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/387442631e38600a3b6d35e921814e0c/zapivuf.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/ule6vhnlp2qo8r50pub9jtd97m/62620747136.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095e97342656---zujewawixolorapijo.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/83560655548.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/on1j9tbrpevudrfj3ppk76t5dp/48943325389.pdfIn PDF document text
    • http://alexanderjamesbackcatalogue.com/userfiles/file/lizilu.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/efa94276547c49e0f602176ed49e9cb6/21236298713.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/fb185ac55953087e35c0f5aa9bd4b5a7/nabuwij.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160761f4c8fff5---51637261011.pdfIn PDF document text
    • http://ndt-tl.ru/upload/file/64319817023.pdfIn PDF document text
    • http://indel.sk/userfiles/file/64184548724.pdfIn PDF document text
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/92394930009.pdfIn PDF document text
    • http://poorclarescork.ie/images/jajefad.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16079cc64cabb8---rexikepodova.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/f1a77224aa56bc6722a27de16f14dd08/45555263665.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
    • 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D9 5412 bytes
SHA-256: 920076b5c236ab3f32ce6bdf68be1f82f6b1afdd4332b9ec4d1eb54f5d781d7b
font_01_sfnt_off0000fa3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3B 10996 bytes
SHA-256: 274716df15746ab245c6ada3fe73eeaba8978a209b06fc6fe4250a88dc96e00c
font_02_sfnt_off00011fe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE7 16164 bytes
SHA-256: c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e
font_03_sfnt_off000134fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134FC 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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