Malicious PDF — malware analysis report

Static analysis result for SHA-256 2abfdd9fd0bcce0a…

MALICIOUS

PDF

88.0 KB Created: 2021-07-19 04:44:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 90c92fd22b3d9e1cd5cf80377a8d6c34 SHA-1: 8093d3bcf3d36aa21896719e2cc86bf6003c32b3 SHA-256: 2abfdd9fd0bcce0a93ec6b4f328f36eb89ebdc8ee4ab7382b59759a104e0017e
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1539 Steal or Forge Credentials

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites, suggesting a link farm or phishing infrastructure. The 'SE_MFA_LURE' heuristic strongly indicates the document's purpose is to harvest credentials or abuse multi-factor authentication. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with known phishing lures, and the ML classifier output further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/41efrkulg7bvbq352ocsu3mbj5/waresewax.pdf In PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/n7amom4ipf2m0kku3vadtol2uk/jozujo.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3d2b6333a6---51199649718.pdfIn PDF document text
    • https://healthmatters.me/userfiles/file/14932018460.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4eadad591---39554155749.pdfIn PDF document text
    • https://hostingalani.com/calisma2/files/uploads/10769063310.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc4fc0ec477---ramemeluwerugalekejol.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/c37ba1fc3c85ae3c3a4c2d1b9c684c31/28209642125.pdfIn PDF document text
    • http://famillespourstarlight.org/clients/a/a9/a9b42c05011d3bb27e7f7ec2ed30324f/File/48183128156.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/97525ee7b758ebe0b5a418d334957ecb/72241186316.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160818f8bbd16a---voxiwofipowozifoxak.pdfIn PDF document text
    • https://bruceleevideos.org/images/file/92705385910.pdfIn PDF document text
    • http://thetestmag.com/userfiles/files/15598160918.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/gid3r7i1raajf3nuqv0ifd9uv0/74022216576.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/3798f96a6a07c2f53680f8c76f2a42a8/50564094508.pdfIn PDF document text
    • http://autoset66.ru/admin/ckfinder/userfiles/files/zezerude.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/70953438026.pdfIn PDF document text
    • http://backupcenters.com/userfiles/file/34213781728.pdfIn PDF document text
    • http://wearefamilypalestine.com/clients/3/3b/3bc38fc23f9ffb54b20226cbd6ad6ce3/File/71530862623.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/pmthb8q0nhg4ra9n4vshb5e476/49883660995.pdfIn PDF document text
    • https://angkaganjil.com/contents//files/waxifozezumorabomav.pdfIn PDF document text
    • http://amdind.com/userfiles/file/bixatigukarininojibegap.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/kpflf1aa5b7n4gh5r9rhjiod69/39645394233.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c7530780bfa---monugirom.pdfIn PDF document text
    • https://miaousland.fr/ckfinder/userfiles/files/4464933018.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bb874c8c65c---gibufovura.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/d3b699e7102e4d2f9c1d1c7263262363/futofovajediwawesefosefe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=instagram+followers+hack+50k+free+without+human+verificationPDF 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_off0000f17d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF17D 11332 bytes
SHA-256: e98b5f969a1efa5797c6fb5024fa9fec681a8ae68d6d8532613204ec6a921346
font_01_sfnt_off00010c15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C15 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12427 17640 bytes
SHA-256: 95b09a86fb009dd7110cdb6f952f1ce372318fcc24c498cc2dd94f17339ccfed

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