Malicious PDF — malware analysis report

Static analysis result for SHA-256 7656304dde84f11c…

MALICIOUS

PDF

66.1 KB Created: 2020-11-17 11:49:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 9f34723fc1b802137c1638dbb47daa09 SHA-1: d5d4012aeddcadf22454364c3bc1a6e59b5c011d SHA-256: 7656304dde84f11ced60cf768f126ee5b4855e25b48400afb557db12c6ca0ab3
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. It contains a large number of external links, suggesting a link farm or redirection scheme. The primary malicious URL identified is https://trafffi.ru/123, which likely serves as a distribution point for further malicious content or phishing attempts.

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://trafffi.ru/123?utm_term=how+to+calculate+spell+save+dc+5e+cleric PDF link annotation
    • https://vezupololepabuk.weebly.com/uploads/1/3/4/6/134600483/kitajakikumifi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387219/normal_5f8dfe61b8298.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365580/normal_5f8b230b48782.pdfIn PDF document text
    • https://mudagetani.weebly.com/uploads/1/3/4/3/134381332/030a370e8.pdfIn PDF document text
    • https://misutinulil.weebly.com/uploads/1/3/1/4/131407711/4567894.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412396/normal_5fa0e0e7ef4b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379054/normal_5fa5737674c55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387056/normal_5fa98aefbb278.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369630/normal_5fb044ce56e25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393641/normal_5f9a66f17a291.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369158/normal_5f8fe7c09d2a1.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/lulelepese/edison_tech_center_tmcc.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/39659546773.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/shee_venath_shrine_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/30955503230.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_off0000c7ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7AC 5304 bytes
SHA-256: e18f7d3c56badd92354473128589e3398f948d74867d0ab660eb157ce11e13af
font_01_sfnt_off0000d9de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9DE 9860 bytes
SHA-256: cca079485a667864a111b67fca96b5e50d4dce098638a55c25763363ce9b5589

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