Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3474bd57298f826…

MALICIOUS

PDF

63.9 KB Created: 2021-06-02 17:35:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a5df312b1bdb339c2f5a72d742d9783 SHA-1: c8c3922e39963dc262e3822d4de56dcdc350ac20 SHA-256: d3474bd57298f826dbd3ce1211bd49543f297f337f8d8f64ae9db2612a79c32b
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, and is flagged by ClamAV as a phishing trojan. The embedded URLs likely lead to malicious content or phishing sites. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure and heuristics indicate a malicious intent to redirect users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8599

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://medvor.ru/pbw?utm_term=action+research+project+for+b.ed+students+pdf+in+english
    • https://cdn-cms.f-static.net/uploads/4456116/normal_60527fd339f1d.pdf
    • https://static.s123-cdn-static-d.com/uploads/4465924/normal_60b40b56c61cf.pdf
    • https://cdn-cms.f-static.net/uploads/4390057/normal_606873eb02161.pdf
    • https://cdn-cms.f-static.net/uploads/4479224/normal_602a836752a27.pdf
    • https://cdn-cms.f-static.net/uploads/4427538/normal_5fd9a1b969ea5.pdf
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/3200404.pdf
    • https://jikizukudelo.weebly.com/uploads/1/3/4/8/134879768/2434597.pdf
    • https://xedafiwiwez.weebly.com/uploads/1/3/2/3/132302754/409dfcee37cf.pdf
    • https://gajamonorafu.weebly.com/uploads/1/3/5/3/135389334/vatimo-mutipizemaxe-vudokolesizur-pibevuta.pdf
    • https://gidipefodato.weebly.com/uploads/1/3/5/3/135348522/petemij.pdf
    • https://farumurul.weebly.com/uploads/1/3/5/3/135326432/2a4301a3.pdf
    • https://cdn-cms.f-static.net/uploads/4454046/normal_603501433142d.pdf
    • https://lusizemanu.weebly.com/uploads/1/3/4/1/134108609/0dde3ae.pdf
    • https://cdn-cms.f-static.net/uploads/4388274/normal_5fe8042677e7e.pdf
    • https://milonotupilo.weebly.com/uploads/1/3/5/3/135347339/ee8d7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d3074062-99e7-4347-9e51-3bb06a55f894/sokapokul.pdf
    • https://uploads.strikinglycdn.com/files/d6055aec-2bfa-4c9a-a540-9a4182eac2b5/sofoturerelapikanasenose.pdf
    • https://uploads.strikinglycdn.com/files/383e3131-cfde-4d29-baf0-19136d85b94f/90449444961.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6a7.bin
92ea398993c6aa0e23a84e5105557e6f0ad5e2bca8f74b1916d99d78e8fb5895		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A7 5652 bytes

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