Malicious PDF — malware analysis report

Static analysis result for SHA-256 a06978654c140e9f…

MALICIOUS

PDF

104.3 KB Created: 2021-09-07 15:48:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d7f143974bfee27296b0fbd9fd3f6332 SHA-1: 951e3f517d1d031a864e37e2b69fac93dab75ace SHA-256: a06978654c140e9f6ec0164eca88a67d4c60bd7a2a5bfc1a728b32bc36f47e51
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting, suggesting a link farm or redirection mechanism. The primary attack pattern involves directing users to external malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://allytemp.ru/uplcv?utm_term=terry+eagleton+criticism+and+ideology+pdf PDF link annotation
    • http://studioghittigargnano.com/userfiles/files/suvimisemavodulagelefobop.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/ds27md8a7dkupdsi7v1cvgnhse/99416711771.pdfIn PDF document text
    • http://aprt1day.ru/file/pakiwimerowimigutinipaxu.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/16118d990cab40---suxegaralofeb.pdfIn PDF document text
    • http://charivne.info/images/file/kavipopo.pdfIn PDF document text
    • http://inventory-acepipe.com/images/uploads/files/gapovofawebazasel.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160aaac9093408---75280926572.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f54a5a6419---63031655618.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d3ce3d859b---86035110047.pdfIn PDF document text
    • http://bm-shower.com/userfiles/files/33265850478.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/f5b1a67e3ca9d776d08d31fe4384526f/jebugamekurugekikagir.pdfIn PDF document text
    • https://hefcom-hydraulics.com/ckfinder/userfiles/files/rurezu.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610b16a8af810---tuwer.pdfIn PDF document text
    • http://anneadamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/55983827425.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16094aead718e5---sinezuk.pdfIn PDF document text
    • http://tpokebar.com/uploads/files/rijowebafoviwe.pdfIn PDF document text
    • https://sgpropertylawyers.com/wp-content/plugins/super-forms/uploads/php/files/196a3f6bd36eeefb94f4e4735b3bfa8d/vozotomabokiwuboxojetefi.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/46851316922.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/otiau8548b45gh78l945cnmkab/66654641009.pdfIn PDF document text
    • https://actor-conseil.com/files/file/2324739009.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/21118499446.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16082d92e14427---doxadoferu.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fe983e1ffe---19240394027.pdfIn PDF document text
    • http://st03.it/userfiles/files/vilozobesitomu.pdfIn 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://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_off00012f7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F7D 11040 bytes
SHA-256: 58f778ecea5da881d6a21bbce65a29a2ceeb4ce527e0da326256701bf6956aff
font_01_sfnt_off000148f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148F8 19528 bytes
SHA-256: 3ec1c16831a562831b27b5b0313ea3a37acd060b9998139d98757eaf604b5521
font_02_sfnt_off00017b53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B53 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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