Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b74c535b0e7ff5d…

MALICIOUS

PDF

86.1 KB Created: 2021-07-06 03:01:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 9e3205359afbaa42b702bb94168fcf7e SHA-1: c962263bc9cd06e223282de82bb1d0582f4bcca1 SHA-256: 7b74c535b0e7ff5d7474d0372aa6ba617079efd15a0fdd1ecefd6d03b7ea0732
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting it's part of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. No scripts were extracted, so the primary attack vector appears to be the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e11184e975---92204758748.pdf In PDF document text
    • https://www.temsilcifirsatlari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608312fcd5981---66082525663.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/0502cb7f7a29d035ad1b79c2e13d5240/gexurelobonekagapoxuwi.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca2fe7f412---duragasejudixuk.pdfIn PDF document text
    • http://elitvorota.ru/f/file/63493717563.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a04d219472---40314212047.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160843da8f0338---jalis.pdfIn PDF document text
    • http://nlureunion.com/clients/33063/File/pezewovajowibasujib.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/kkh2tcv0uve0m6lbnf453tnvmb/50188688586.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/49303327167.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/nilazuxudewek.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160814caed2942---domizewu.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afbf705f5dd---zolebaxibotabuzofilesuni.pdfIn PDF document text
    • https://travelstore.tn/userfiles/file/54447146289.pdfIn PDF document text
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/6111eb730489739ef3e4d468cbdf545e/vuwodexalirirusimikafe.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/dqsb5jugf27f2abjojh1a5o9uo/bipolobovaxikigaxogugi.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b920f9ed5aa---77814153133.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a13300e3005---jesasemomedune.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/3rck97l072kh986v5n2o18g9jg/38540493290.pdfIn PDF document text
    • http://nashcentralfalcon.com/clients/d/d5/d5bea9c86035def548a020f7371d19fe/File/farabadutabexutebuvotujar.pdfIn PDF document text
    • http://e-hane.com/files/lerepegonekegijavi.pdfIn PDF document text
    • https://lionkingbali.com/uploads/file/bixamovapen.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=operations+research+excel+solverPDF 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_off0000ec9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9E 17488 bytes
SHA-256: 73c380a63dc33099d416025916a3a4a06d8e4ee57b06b5f78b7eaa7de3a2491b
font_01_sfnt_off00011a91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A91 10664 bytes
SHA-256: 8b360b3c7343eb9230c553557b4d12f70ec1fe6e30b1faf3c228660ef7445fb9
font_02_sfnt_off00013304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13304 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.