Malicious PDF — malware analysis report

Static analysis result for SHA-256 7523905593378336…

MALICIOUS

PDF

95.2 KB Created: 2021-08-07 18:25:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: 23be6c0e49f2738fab876aae04308c8c SHA-1: 061d79b4fb85a1e32f9581d65bb0787fcd3d1233 SHA-256: 752390559337833667bb725196eb064fa7e18d41242be95749b51f772d7e9353
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains numerous links pointing to compromised websites and disposable hosting, characteristic of a link farm. The primary purpose appears to be directing users to potentially malicious or phishing content through these links, rather than delivering a direct exploit within the PDF itself.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/ee0gok8h501i3vcuh2ef74rsbl/36381684565.pdf In PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160854ecb014c5---15006310108.pdfIn PDF document text
    • http://nhsclassof77.com/clients/c/ca/caa0b9827732345dad94809623212052/File/76528311611.pdfIn PDF document text
    • http://csc028.com/userfiles/file/20210724024323_sebnoa.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/em92k0fav7831ff68jg1n5tjci/62560603381.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/9u38m37jkej98tgiv30933i8km/91637265424.pdfIn PDF document text
    • https://bodykneadstherapy.com.au/ckfinder/userfiles/files/bubax.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bd444993687---48990211205.pdfIn PDF document text
    • http://francescofesta.it/userfiles/files/32488206745.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c2a372939cf---pabaruxifepevebununasas.pdfIn PDF document text
    • https://brickbodysupplements.com/newerac2c/userfiles/file/wevotugopelebifosuxeze.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb032c0eae---xigirikonepabuzobasita.pdfIn PDF document text
    • http://cl-metalparts.com/d/files/24409352561.pdfIn PDF document text
    • http://lookkorea.net/userfiles/file/tawugenojofibirofevogu.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/e4079a3df401502ebf88a5adccf66a53/29719278527.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609949440389a---vepizujago.pdfIn PDF document text
    • https://binarbaidtrading.com/public_html/userfiles/file/14147191558.pdfIn PDF document text
    • https://gym-rectif.fr/ckfinder/userfiles/files/66429262357.pdfIn PDF document text
    • https://ancoraeducacion.com/images/zetilifuremasugulujep.pdfIn PDF document text
    • http://tuyothuyluc.vn/webroot/img/files/razaf.pdfIn PDF document text
    • http://3qlohas.com/CKEdit/upload/files/3478310947.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=calculadora+de+integrales+por+fracciones+parciales+onlinePDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E9A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000126ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126AC 17740 bytes
SHA-256: a3a32b8d62a4e6163eabf9c3405b93630b7d11bfc585928baed12d36f4b1fb08
font_02_sfnt_off00015378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15378 10928 bytes
SHA-256: 0f04d78c2a272b4dc7abafc6155bcb5ff9b77af8fd87891ee1b232ca73485fd7

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