Malicious PDF — malware analysis report

Static analysis result for SHA-256 a65205c4d538c716…

MALICIOUS

PDF

84.0 KB Created: 2021-09-12 03:50:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6b9bff184edd17f5592d7798118b0b5f SHA-1: 352fa72cd648bb7517e719a31ed970567be9f6d9 SHA-256: a65205c4d538c716b6956238f92aadb23ddd8d8861c923d867bd76d3aae8d334
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, suggesting a link farm or redirection mechanism. Heuristics indicate it's a link farm on disposable hosting and ClamAV detected it as a phishing trojan. The ML classifier also strongly flagged it as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://huntic.ru/uplcv?utm_term=redmi+note+4+vs+poco+x3 PDF link annotation
    • https://fulzugaskozpont.hu/files/88900719640.pdfIn PDF document text
    • http://2rent.gr/userfiles/file/71089072358.pdfIn PDF document text
    • http://hilimall.ae/uploads/files/rifazoxi.pdfIn PDF document text
    • http://coral-travel66.ru/admin/ckfinder/userfiles/files/22700288410.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/71972391055.pdfIn PDF document text
    • https://mvmdigital.gr/files/files/sogekugasenakijeroda.pdfIn PDF document text
    • http://commsoft.nu/demo/ktb/wsmbilder/files/39336140441.pdfIn PDF document text
    • https://vhssirimpanam.org/ckfinder/userfiles/files/tekozoji.pdfIn PDF document text
    • https://hanyauntuktesting.com/contents/files/saxuvawilokalasisirizomo.pdfIn PDF document text
    • https://vocembalo.ch/userfiles/file/56285462595.pdfIn PDF document text
    • http://fuerst-architects.com/uploads/file/66903086621.pdfIn PDF document text
    • https://brianhigbielaw.com/UserFiles/file/lujasizukesexavawefoped.pdfIn PDF document text
    • http://trineckevzdelavani.cz/webpagebuilder/ckfinder/userfiles/files/jufizagejuw.pdfIn PDF document text
    • http://ig-einheitsloks.de/medien/file/bovajelimomakudodixe.pdfIn PDF document text
    • https://eownauto.com/uploadpic/files/besuvabe.pdfIn PDF document text
    • http://sov.tranovice.org/webpagebuilder/ckfinder/userfiles/files/ruvasukozofulapofebavu.pdfIn PDF document text
    • http://01host.ru/userfiles/files/fajowivekobomizu.pdfIn PDF document text
    • https://mimpishio2.net/contents/files/fowitotowejavavuxilod.pdfIn PDF document text
    • http://faisaltowel.com/survey/userfiles/files/pivabuwepuzudawiwexewiv.pdfIn PDF document text
    • https://togeltop.net/contents/files/17999629733.pdfIn PDF document text
    • https://deltagroup.bg/uploads/file/bofexuxikowuwuviz.pdfIn PDF document text
    • https://adesso-moosburg.de/images/file/gukafugexug.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/3337efd47fb5ed41937fef1655b00712/83888577869.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_off0000da7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA7E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF295 10828 bytes
SHA-256: 1ce0a18a7e6b6a478a63f8fa5950cfdd08590650b5ba4c8fae565183e2917951
font_02_sfnt_off00010baa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BAA 21264 bytes
SHA-256: 0bd834029b793ae362b2e20f0a8a51986760d9f0bdfe893d8d6ed7ae9735a9f5

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