Malicious PDF — malware analysis report

Static analysis result for SHA-256 93ab8e410d0e7951…

MALICIOUS

PDF

79.3 KB Created: 2021-09-21 12:04:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 29ce3cbfd14eb61930402b854384d5ee SHA-1: abdc0f93c013a6e4202c7cbb9350a97e4c51d963 SHA-256: 93ab8e410d0e795153ce6963a339fd080df7e8ecfbec4c406c5b09d9e944abf7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ClamAV as 'Pdf.Phishing.Trojan' and ML classifiers indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://s8radziejowice-paszkow.pl/userfiles/file/49099529824.pdf In PDF document text
    • https://yasacompany.com/upload/files/pogotenigadikanevibewux.pdfIn PDF document text
    • http://forspeed.cz/ckfinder/userfiles/files/56367746529.pdfIn PDF document text
    • http://galluccifaibano.com/userfiles/file/finaxosubogarobanon.pdfIn PDF document text
    • http://dispensapertutti.com/userfiles/files/tuloguxavamowe.pdfIn PDF document text
    • http://auswallendorf.de/userfiles/file/37626167653.pdfIn PDF document text
    • http://ovecollection.com/royal/admin/images/products/file/78372161241.pdfIn PDF document text
    • http://stensoproject.com/userfiles/files/wewokosubuxegagimin.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143365a6bd99---34990854180.pdfIn PDF document text
    • http://medica-eg.com/userfiles/file/tewixowenefozepanuru.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/numofixerokiwokisabosa.pdfIn PDF document text
    • https://spirit-legend-enterprises.com/webroot/editor-uploads/files/basijazonopeja.pdfIn PDF document text
    • https://marwaautorepair.com/nbloom/fckuploads/file/52455258552.pdfIn PDF document text
    • http://myepres.com/HotelEstimator/userfiles/file/57279506702.pdfIn PDF document text
    • http://sujitonweb.com/userfiles/files/65754239781.pdfIn PDF document text
    • http://bennett-legal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lebojipafome.pdfIn PDF document text
    • http://millecolori.it/images/file/kosewakujudinesadulitax.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/8e779d26a22df044aad34a59084d1ced/16807953523.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/30e96a64822812579830e72620681722/77139155176.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132872295b5e---sezotuzumigibabojebujatav.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/f51d00242470b0ebac2347ab6e66c3e8/geguxodivunu.pdfIn PDF document text
    • http://sangtaoad.com/uploads/userfiles/file/63215151731.pdfIn PDF document text
    • http://thechitay.com/uploads/userfiles/file/tixelutinaganejuliwuvim.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=syncing+contacts+from+android+to+gmailPDF 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_off0000d1c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1C9 10876 bytes
SHA-256: b62c7262eeed8f540ccb170337a8585d9cbe17950a99959bc015e6a103c84e1d
font_01_sfnt_off0000eab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB4 17288 bytes
SHA-256: 4737bf54284e7bee18d13ad8ea85ba7db6f4c8dff063941b15382aa3c0cc1a7b
font_02_sfnt_off000117cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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