Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bfab89d8aa40338…

MALICIOUS

PDF

49.6 KB Created: 2020-11-13 05:07:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19e96d0a516a296ce117e1e142610940 SHA-1: 20c370ed3039e4b5116b311ebedc03d99aae57be SHA-256: 4bfab89d8aa403385b55269dcf0f743695e62965958bdf223b1d078082f39484
154 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external links, suggesting it is part of a link farm or SEO spam campaign designed to direct users to potentially harmful websites. The primary URL, 'https://trafficel.ru/aws?utm_term=que+sera+sera+song+free', appears to be a lure to disguise the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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://trafficel.ru/aws?utm_term=que+sera+sera+song+free
    • https://cdn-cms.f-static.net/uploads/4368475/normal_5f89331f24d96.pdf
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/2122744.pdf
    • https://gikotibosad.weebly.com/uploads/1/3/4/3/134332820/473364.pdf
    • https://tirigimufaregi.weebly.com/uploads/1/3/4/4/134464067/mepet_wudabe_fumolir.pdf
    • https://cdn-cms.f-static.net/uploads/4375083/normal_5f945a1d687d0.pdf
    • https://cdn-cms.f-static.net/uploads/4393029/normal_5fa656fa9e88b.pdf
    • https://bokixewabukogu.weebly.com/uploads/1/3/4/3/134341992/cdea8533064e1.pdf
    • https://zopojidiluze.weebly.com/uploads/1/3/4/3/134361294/werito.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jinabom/43984206288.pdf
    • https://s3.amazonaws.com/sinamozagemoger/dota_underlords_build_guide.pdf
    • https://s3.amazonaws.com/taruzudov/nexikasifelenuwesabu.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ae0f.bin
5a3b23c4d970f65aafd9ba218df22d0d59790d4e55f885cd70d49e415e69af08		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE0F 4964 bytes

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