Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e7302406731184a…

MALICIOUS

PDF

85.5 KB Created: 2021-07-23 20:31:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ec3400ae3cd12ba80a245ffa24cc5b61 SHA-1: bcb652e69f4d923852e44a63757a307fe6011704 SHA-256: 1e7302406731184a20f9b07cfe5628ed4490429e9df189faf55b9f61b88aa773
156 Risk Score

Malware Insights

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

The PDF file contains a large number of links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, and the document body was unreadable, but the URL structure and heuristic firings are sufficient to assess the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://moolans.com/uploads/files/fogukisixipalavovukutofeb.pdf
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160789c1da7f4b---73567281491.pdf
    • http://stellar-toys.com/ckfinder/userfiles/files/5439262076.pdf
    • http://southeastern61.com/clients/0/07/0748cf78e2268043913ae7c14e09e996/File/fenigo.pdf
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608624760df62---43457222000.pdf
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609cbdd7c4406---65993735790.pdf
    • https://soudurelauziere.com/upload/editor/file/lewen.pdf
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d12260bc50---77709219690.pdf
    • https://aspirans.com/files/file/76487915406.pdf
    • http://classicalgardenornaments.com/uplds/file/42836879519.pdf
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e5055417ba7---848981868.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/lc2lgpav950s0p2ifku8nfvgg3/mesafa.pdf
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/16075eee622b96---8929227021.pdf
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/0bd5bc44a4928d25afefd727aebd5b26/zoxikaberuwubikararivokiw.pdf
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ba9e8b099d---38592956529.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/f3150621f0463210d87da84f5127956d/13733775772.pdf
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/4566283f908abd9fb9236414497b4176/18777387001.pdf
    • https://aronabritcan.com/userfiles/file/25243962862.pdf
    • https://aduanaldelvalle.com/userfiles/file/73360127801.pdf
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/508f766f65c6ddcae021d680ebd4ed33/48662369064.pdf
    • https://alakharia.com/public_html/userfiles/file/29795723679.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=what+is+f1+on+fisher+and+paykel+dishwasher
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e93f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE93F 16792 bytes
font_01_sfnt_off00010151.bin
1035353e9f66eddd92082b83aea7d8fad57baabd3e056994723f456d9e2d551e
pdf-font-stream PDF embedded font (sfnt) at offset 0x10151 17388 bytes
font_02_sfnt_off00012eae.bin
768e3f62165aa50e27b49baec283cbc6abae0af7f540291e6333eb5ed473feda
pdf-font-stream PDF embedded font (sfnt) at offset 0x12EAE 10932 bytes