Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd9e328568ecad0d…

MALICIOUS

PDF

58.6 KB Created: 2020-11-20 03:08:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef964d47b43ddd0b9e03fc84f3cdfdc8 SHA-1: 9f27fc2ed0823c64acdf3951a4e2921a0052303d SHA-256: fd9e328568ecad0d4cfe36b930bc267745d8c9d257af0a65d111600954555beb
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, many of which point to PDF files hosted on file-sharing services. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, suggesting an attempt to manipulate search engine results or distribute content. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification further support its malicious nature. The embedded URLs likely serve as lures to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8144

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://trafftec.ru/aws?utm_term=bloons+tower+defense+5+apk+pc
    • https://muxalogedidu.weebly.com/uploads/1/3/4/3/134358485/ritepopazonen.pdf
    • https://cdn-cms.f-static.net/uploads/4368245/normal_5f87c19177bf5.pdf
    • https://cdn-cms.f-static.net/uploads/4416495/normal_5f9c3f473751a.pdf
    • https://vogizezadu.weebly.com/uploads/1/3/0/8/130814341/64f2f281f85.pdf
    • https://juvirafiwak.weebly.com/uploads/1/3/4/3/134307718/felumokare-rabidukazel.pdf
    • https://fofonameg.weebly.com/uploads/1/3/4/5/134522304/4303940.pdf
    • https://cdn-cms.f-static.net/uploads/4393034/normal_5f99d7493ca84.pdf
    • https://tevumusavobe.weebly.com/uploads/1/3/4/1/134108657/3730608.pdf
    • https://cdn-cms.f-static.net/uploads/4374374/normal_5fa40cd1defc6.pdf
    • https://mujetuzavos.weebly.com/uploads/1/3/4/2/134266282/8154038.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a3551a41-1383-4460-88c9-cee74bc3bd2e/calcul_section_cable_schneider.pdf
    • https://uploads.strikinglycdn.com/files/6f98c82d-83c0-4bf9-adc4-1b4b0324612a/lewizux.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9a3.bin
dc6ecba31bd520202375cfe5ac9be4713cef81fbb777dfe3fabe63f2c5154c53		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC9A3 5476 bytes

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