Malicious PDF — malware analysis report

Static analysis result for SHA-256 140340c586bc932a…

MALICIOUS

PDF

74.6 KB Created: 2020-12-08 06:50:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: b60cb4c73b5296d4fef6be89db3ab2cc SHA-1: 1845f09a57ee1fcb4caed9c26851892a977c5e74 SHA-256: 140340c586bc932a62186bce5e52bc53e5eae133672c20a8d79d2b57be98c472
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a phishing or trojan threat. It contains a large number of external links, suggesting a link farm or SEO manipulation tactic to direct users to potentially harmful websites. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly indicate an attempt to redirect users, likely for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafftec.ru/strik?utm_term=divine+right+definition+for+dummies PDF link annotation
    • https://lupigufenof.weebly.com/uploads/1/3/4/5/134509144/3839e57.pdfIn PDF document text
    • https://juvudunepuzuvo.weebly.com/uploads/1/3/4/5/134513453/dejazaxonokowod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366324/normal_5fcdbb07d6acb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375077/normal_5f8ddd8a48329.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375909/normal_5fbd4b7a99ad5.pdfIn PDF document text
    • https://lariwajiko.weebly.com/uploads/1/3/4/3/134316624/wonuki.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/megulu/76988313206.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/vsepr_theory_shapes.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5211dec917750a3f31b0b/t/5fcb9a8d9cf56e0e8b14aa24/1607178893685/taxulikonirasekobedefewom.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/six_sigma_black_belt.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/neburuvinuxanefasiket.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_off0000e50d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE50D 5140 bytes
SHA-256: 76881fdd8e28e378aa03ae6f50dd7787fd76754aa8a903345e268a0ba1cb30f4
font_01_sfnt_off0000f674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF674 11140 bytes
SHA-256: 0db57e062f7f6b284359d2160ae8ecb957452e652988677b5a8fcb2e2c088079

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