Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1096f6c68b87523…

MALICIOUS

PDF

80.0 KB Created: 2020-11-29 05:42:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 94c5933894a4f4fb576c60ab4c9bc08a SHA-1: d0885d7d620ee738384953477f56738b7082a507 SHA-256: d1096f6c68b87523792728d86271f48e87e68c93729f20fa997288f765f31151
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a fake browser/software-install lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://traffine.ru/strik?utm_term=oxo+can+opener+not+working PDF link annotation
    • https://xovelojedawoka.weebly.com/uploads/1/3/4/6/134662979/mibisoloxup_pexin_xiwarinoku.pdfIn PDF document text
    • https://burakobid.weebly.com/uploads/1/3/4/6/134602904/b23579fa0176.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366043/normal_5f87171b25bfc.pdfIn PDF document text
    • https://vebupixe.weebly.com/uploads/1/3/4/8/134854050/diwupuwukapatasafe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402501/normal_5fa2fb688de1f.pdfIn PDF document text
    • https://bitokulizawefe.weebly.com/uploads/1/3/4/6/134684274/najixufa_parofil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383566/normal_5f9975ea9931d.pdfIn PDF document text
    • https://mepuralomelefaz.weebly.com/uploads/1/3/4/4/134494325/fexediwo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368477/normal_5f8b80cddfcf1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1f2141d-8e1e-437d-8d97-831c85adaa57/sozigutudavenedafedamura.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/victorinox_dive_master_500_automatic.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/tangled_movie_free_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/16901442060.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://scripts.sil.org/OFLIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA21 5144 bytes
SHA-256: 92a552283bdb163d76f39113a5e9ed83bf42733ddaa31f42c35ba0a52c7341c7
font_01_sfnt_off00010bd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD1 11532 bytes
SHA-256: 1f81b48499d3a85a281a2df0fbb60fbf082bd2e2e4a180cb9cb575321953f778

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