Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ac95fe0e0dae155…

MALICIOUS

PDF

71.9 KB Created: 2021-06-06 13:49:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76070dcb925d499bf286fcb1d359ddd8 SHA-1: eade99d5c87fc4212e8c95ae5fd419d3457c3728 SHA-256: 6ac95fe0e0dae1553ac67d034ede77561c2ad96976f1f1789f9f140d20d67b91
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on file-sharing or personal domains, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier flagging indicate malicious intent. The presence of embedded URLs and the heuristic PDF_SEO_LINK_FARM firing strongly suggest the document is designed to redirect users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6714

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://queure.ru/pbw?utm_term=assassin%2527s+creed+revelations+t%25C3%25BCrk%25C3%25A7e+yama+1.03+indir
    • https://gitexapovaje.weebly.com/uploads/1/3/4/4/134464395/d636c85.pdf
    • https://static.s123-cdn-static.com/uploads/4454168/normal_5febed7b69822.pdf
    • https://jejojoroliwe.weebly.com/uploads/1/3/4/3/134310913/5246810.pdf
    • https://serinuvof.weebly.com/uploads/1/3/3/9/133997237/a12a800.pdf
    • https://cdn-cms.f-static.net/uploads/4448746/normal_604332fc03bae.pdf
    • https://gelasinez.weebly.com/uploads/1/3/4/7/134763890/zovagakotuwu_wezarexumuri_wokabavisef.pdf
    • https://cdn-cms.f-static.net/uploads/4529893/normal_6039980c8297e.pdf
    • https://zoxutelipiroga.weebly.com/uploads/1/3/1/8/131871488/foduxufalupa.pdf
    • https://kasugokadudibuk.weebly.com/uploads/1/3/4/7/134740653/zuzosuwajijabuxu.pdf
    • https://sarununow.weebly.com/uploads/1/3/4/3/134366188/6763633.pdf
    • https://duwifugikez.weebly.com/uploads/1/3/5/3/135351140/1312426.pdf
    • https://cdn-cms.f-static.net/uploads/4462362/normal_5fe6b583c30bf.pdf
    • https://cdn-cms.f-static.net/uploads/4499995/normal_600ffddda8766.pdf
    • https://bivibubumi.weebly.com/uploads/1/3/1/6/131637176/0394f.pdf
    • https://xidatajabo.weebly.com/uploads/1/3/4/3/134375349/foramezobi.pdf
    • https://jewajufigojoxi.weebly.com/uploads/1/3/1/4/131438211/6257924.pdf
    • https://ziwobusomuka.weebly.com/uploads/1/3/1/6/131607005/9130080.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/fc81d1ce-5f5f-4f01-970b-21b3021f0020/city_of_glass_paul_auster_book_review.pdf
    • https://uploads.strikinglycdn.com/files/d8a11b43-3ea4-4c94-ab58-a6a114b6dd08/delonghi_magnifica_s_plus_price.pdf
    • https://uploads.strikinglycdn.com/files/7624d48b-4fe1-42bb-bb7d-6555f88f2a12/what_is_class_a_b_c_or_g_airspace.pdf
    • https://uploads.strikinglycdn.com/files/3a21b5d4-06d1-4b3a-8741-10244bd83ba9/14726857142.pdf
    • https://uploads.strikinglycdn.com/files/f81d87ad-19e9-43df-8f81-ac849a7682d4/graco_solano_crib_assembly_instructions.pdf
    • https://uploads.strikinglycdn.com/files/ed36b222-82bb-4fe5-96eb-4aa58e35b56e/minecraft_pocket_edition_beta_tester.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4dd.bin
963f6d8d77dcebbf8558e3176ac16f4bb24037707bead4f995a5ee8d73c840ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4DD 6024 bytes
font_01_sfnt_off0000f8ec.bin
19897c287221897614220cc8b8befe9129ee0ce3794ef408cf1256b52b8cad83		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8EC 13560 bytes

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