Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6dbcf0697656325…

MALICIOUS

PDF

67.2 KB Created: 2021-02-28 09:23:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 423c36720192476cbc17af4b727b4d9e SHA-1: ed822dddb9bbb1930703044972d895ba67c7e2c1 SHA-256: e6dbcf06976563258c88c2918ac4cca58f246b82827fd90f310909fd42f2bb8f
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent link leading to 'dugedepap.ru' disguised as a product manual search result. This suggests a phishing or SEO poisoning attack pattern designed to redirect users to potentially malicious sites. The ClamAV detection and ML classifier further support its malicious nature, indicating it's likely a phishing or trojan delivery mechanism.

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://dugedepap.ru/award?keyword=brady+bmp21-plus+manual PDF link annotation
    • https://vafopizinenited.weebly.com/uploads/1/3/4/4/134480139/zuzasofoguvafabokof.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411931/normal_5ff7134f134e5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411491/normal_5ffe1a0e3ee85.pdfIn PDF document text
    • http://tevaruv.sportsontheweb.net/wofan.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/vukusa/90507436006.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/26260042331.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/76093258933.pdfIn PDF document text
    • https://s3.amazonaws.com/fulazelof/77029924446.pdfIn PDF document text
    • https://s3.amazonaws.com/pasutiz/37976654939.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/chimni_pakhar_film_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/868478122.pdfIn PDF document text
    • http://namepafubi.atwebpages.com/ps_form_3602-ez_fillable.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/ovulation_calculator_free_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/cyberghost_secure_vpn.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromisixinolib/xozolotila.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_off0000cc39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC39 5612 bytes
SHA-256: 02be5b779f04e74f355a83e9d4aaf0dbf1b6c7a5e5cf3ef8e8682b86b1d1d108
font_01_sfnt_off0000df48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF48 9560 bytes
SHA-256: 1ec7c8d8ecd965cc2b4c2a63ea7180b49724223c5393fe462d776ef1e404be54

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