Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9630a1475e27614…

MALICIOUS

PDF

70.1 KB Created: 2020-12-30 16:01:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 75564b3e856e3cfcba9e4baeaed684d8 SHA-1: 85f2d18f384b8619c5ce6bc978d8cfa7e71384af SHA-256: a9630a1475e276149a430f3f2db362ca30e67d2da014be5e7bb3be5794f628c7
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, suggesting a link farm designed to redirect users to potentially malicious sites. The embedded URLs and the PDF structure point towards an attempt to exploit users through deceptive content, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafffi.ru/strik?utm_term=goldlink+crew+remix PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4424364/normal_5fd95c1daead6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476756/normal_5fba9d84f1f2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483359/normal_5fc305d4af32c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371807/normal_5f93752032613.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392191/normal_5fec4b8510c88.pdfIn PDF document text
    • https://lorufolirosob.weebly.com/uploads/1/3/4/5/134584190/e7a79b48590d8ed.pdfIn PDF document text
    • https://cdn.sqhk.co/masunidupag/hfaFukV/warak_enab_egyptian_recipe.pdfIn PDF document text
    • https://jatasurow.weebly.com/uploads/1/3/4/3/134358583/9f667f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452587/normal_5fb86de378590.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/fedure/3dtuning_unlocked_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/jibosipokabevegal.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/49348079071.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD710 4952 bytes
SHA-256: e55471967c81edbd862dd5c8aa748e679748b4194c7d0840481030bb1fea790a
font_01_sfnt_off0000e7eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7EB 10400 bytes
SHA-256: f2cbca02815f36dd3efce53e2b3cf36569869342151abfb9d8110665b7010757

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