Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef740d24881e425d…

MALICIOUS

PDF

61.2 KB Created: 2020-12-28 20:45:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 719c6a68c7cb73ddfcaa8c6c95eac429 SHA-1: 4c1eb5463b8c1e9efb43d164ddb565cc3ae49060 SHA-256: ef740d24881e425d4f1df51db768b0aa7c8dfdb3a668f0a69d8d860cc9297930
154 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics, including ClamAV and an ML classifier. It contains a large number of external links, suggesting a link farm or phishing attempt. The primary URL identified is traffking.ru, which likely serves as a landing page or redirector for malicious content. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7881

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffking.ru/strik?utm_term=rocket+music+ipswich
    • https://cdn-cms.f-static.net/uploads/4444371/normal_5fdabb63c8c68.pdf
    • https://cdn-cms.f-static.net/uploads/4485010/normal_5fc0ec5d184b3.pdf
    • https://cdn.sqhk.co/dasupejej/fGifiyq/21350127748.pdf
    • https://cdn-cms.f-static.net/uploads/4456393/normal_5fbea4e8ede36.pdf
    • https://static.s123-cdn-static.com/uploads/4497395/normal_5fccf19341399.pdf
    • https://bogatawokajo.weebly.com/uploads/1/3/4/9/134900502/raxisojedot_nafaz.pdf
    • https://tudexabi.weebly.com/uploads/1/3/4/7/134770635/latelodiz.pdf
    • https://cdn-cms.f-static.net/uploads/4368500/normal_5f8a0fe4d7168.pdf
    • https://static.s123-cdn-static.com/uploads/4372076/normal_5fc96c0745a49.pdf
    • https://vaxejoxumede.weebly.com/uploads/1/3/5/3/135346770/5152551.pdf
    • https://cdn-cms.f-static.net/uploads/4419205/normal_5fc29d9714ff5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f370b615-5619-4fb2-810d-307f09874506/fowuzefigegipo.pdf
    • https://uploads.strikinglycdn.com/files/bb42c4e8-91fe-404c-be81-a13fbca8aa48/xufopekegamiwobiza.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c319.bin
47d41b6b033623e8751ebbb043087d7e770f8d081f0069c8f75d80b77517bb2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC319 4772 bytes
font_01_sfnt_off0000d378.bin
de528db0e31ed061aee6b2579f24b00e7f9dd2639c53a8cb126e3679b20b6685		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD378 10692 bytes

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