Malicious PDF — malware analysis report

Static analysis result for SHA-256 571048d964e09bad…

MALICIOUS

PDF

56.2 KB Created: 2020-11-13 23:02:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03db4c95fb96cf2e6c7f1aab2b6a8bde SHA-1: 22eb7552470de192480a7df2d1b44cddc15c57b7 SHA-256: 571048d964e09bad00417d44ab35304308bc40a83dc2cea5bb698c526c9e6071
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to other PDFs, which is indicative of a link farm designed for SEO manipulation or to distribute malicious content. The heuristic 'PDF_SEO_LINK_FARM' and the presence of a suspicious URL 'https://trafffe.ru/strik?utm_term=bloodlust%253A+cerene+-+royal+descent' strongly suggest malicious intent. ClamAV also detected this file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8237

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://trafffe.ru/strik?utm_term=bloodlust%253A+cerene+-+royal+descent
    • https://cdn-cms.f-static.net/uploads/4369911/normal_5fad20c84cdf4.pdf
    • https://bolififona.weebly.com/uploads/1/3/4/3/134316640/4778083.pdf
    • https://zosagejezigim.weebly.com/uploads/1/3/4/7/134709887/6b1664f95ca983.pdf
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/zebapesuluboxaj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/nafoxuda/naxesatejalutudeliwotosi.pdf
    • https://s3.amazonaws.com/zedudo/71354490766.pdf
    • https://s3.amazonaws.com/wopari/40840530366.pdf
    • https://s3.amazonaws.com/jotizifime/lufizutasison.pdf
    • https://uploads.strikinglycdn.com/files/c5a04e19-f423-4bb4-902c-3e67bf3ee283/fugizisiwobetuka.pdf
    • https://s3.amazonaws.com/jamokaroxoj/guxumuma.pdf
    • https://s3.amazonaws.com/dusined/10297615892.pdf
    • https://s3.amazonaws.com/felasorarabipis/advanced_excel_tutorial_ebook.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000baf1.bin
994f3f7cbac626c66ea2f179b1128272d72e2e90fc706ccc7db946fab9557131		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBAF1 5164 bytes

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