Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9ad22092281113f…

MALICIOUS

PDF

70.4 KB Created: 2020-12-19 11:37:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 236ac73442d056f81e700a8be2bbf3ad SHA-1: 99ec6cbd2ce99e134a536d4068478ee7587c6c54 SHA-256: b9ad22092281113fea88b66a9e3a5c2fdbaac5030fd4990f20026970465e7809
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with high-severity heuristics indicating it's a phishing lure using an SEO redirector. The embedded URL, https://trafftec.ru/aws?utm_term=wow+classic+priest+lvl+guide, is likely part of a phishing campaign. While no scripts were explicitly extracted, the PDF structure and heuristics suggest it exploits PDF vulnerabilities or uses JavaScript to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://trafftec.ru/aws?utm_term=wow+classic+priest+lvl+guide PDF link annotation
    • https://xivenisulebitok.weebly.com/uploads/1/3/1/3/131378814/tozolab_wunubolowu_lewafiz_rafuwam.pdfIn PDF document text
    • https://tenikekiso.weebly.com/uploads/1/3/0/7/130775729/7455357.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488592/normal_5fc99735d50b8.pdfIn PDF document text
    • https://fibuwuvonej.weebly.com/uploads/1/3/4/2/134265895/5962609.pdfIn PDF document text
    • https://mofagobebaz.weebly.com/uploads/1/3/4/6/134633285/8643755.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/resisuna/skype_trn_my_tnh.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/23991445258.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/73572449275.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd07f700f7af3919d50222/1606223864206/telodejiwirofuvoteb.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5996dc6d9645836420577/t/5fcc39eb24c49707d3122b79/1607219692407/neighborhood_watch_movie_soundtrack.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_off0000d532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD532 5408 bytes
SHA-256: 0ca6dde84963e22dbdf3d88cae00e054c4066c897efe2626ea0ec2493ee6bfd0
font_01_sfnt_off0000e7c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C6 11108 bytes
SHA-256: a3054ec409d493b805f2c249e1411f331ea0aaa10aab2c3534f793e51e6c1d64

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