Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd5495739395ad0e…

MALICIOUS

PDF

62.2 KB Created: 2020-11-09 17:43:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4177000ab720cfab394867434171f095 SHA-1: ae24628d5813a03d8f7fa3bfd02a85adf882b0c1 SHA-256: bd5495739395ad0e838c5c333a14a5eff44defbecf3f8311a3fd25a496e67c9d
154 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm, which is a common tactic for SEO manipulation or distributing malicious payloads. The ClamAV detection and ML classifier further indicate malicious intent, specifically flagging it as a phishing trojan. While no scripts were directly extracted, the presence of numerous external URLs suggests the document's primary purpose is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7399

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafftec.ru/strik?keyword=holy+spirit+be+my+guide+song
    • https://fulutikirulile.weebly.com/uploads/1/3/4/4/134471812/futopobareloker.pdf
    • https://zizuralozirufu.weebly.com/uploads/1/3/1/4/131483034/murezumavul.pdf
    • https://talinupujisen.weebly.com/uploads/1/3/4/5/134591269/rarura-zipagamefuz-kixenurobul-tonosigotumez.pdf
    • https://kidofepakanuzok.weebly.com/uploads/1/3/4/0/134096393/jenasepago.pdf
    • https://rilebowiteb.weebly.com/uploads/1/3/3/9/133986594/4615c291.pdf
    • https://jevokave.weebly.com/uploads/1/3/4/2/134266272/5499609.pdf
    • https://wodumipanopova.weebly.com/uploads/1/3/4/7/134731655/tonaturede.pdf
    • https://cdn-cms.f-static.net/uploads/4379222/normal_5f920bdd3c2f8.pdf
    • https://kunobile.weebly.com/uploads/1/3/4/5/134517695/2676884.pdf
    • https://bibeliki.weebly.com/uploads/1/3/0/7/130738572/pekaberosevaji-navoxojulan.pdf
    • https://suxifobafip.weebly.com/uploads/1/3/4/3/134370270/348385.pdf
    • https://cdn-cms.f-static.net/uploads/4368971/normal_5f89797d422bf.pdf
    • https://cdn-cms.f-static.net/uploads/4383688/normal_5f8c03e13b26f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf1c.bin
e37221f9718d1bdce5d67753ac6aa241044337f54b79574f3e0401ff171d49ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF1C 5156 bytes
font_01_sfnt_off0000d08b.bin
5c37a014364fda934d98dfa2f6933bcb60689b2af8f89dd6ad60b667bdf86cb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD08B 10472 bytes

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