Malicious PDF — malware analysis report

Static analysis result for SHA-256 204e6e21a04d55ad…

MALICIOUS

PDF

80.8 KB Created: 2021-03-30 19:49:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b60641a8c76205592be4dd3e4e2835a SHA-1: b1b3441f883a076bc9545230a2c98039b2670add SHA-256: 204e6e21a04d55ad33414121132b27bbb73dd04439b168a5abecc5a89db426b2
156 Risk Score

Malware Insights

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

The sample was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating high maliciousness. The PDF contains a large number of external links, with one pointing to a URL that appears to be part of a link farm. The presence of embedded URLs and the overall structure suggest an attempt to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://ponafet.ru/123?utm_term=load+test+on+dc+shunt+motor+pdf
    • https://mawubuzepegi.weebly.com/uploads/1/3/3/9/133989242/ramulajonor-zebijub-mokamipar.pdf
    • https://static.s123-cdn-static.com/uploads/4426816/normal_6001d23cd60c1.pdf
    • https://zezevibowavaki.weebly.com/uploads/1/3/4/8/134854125/tetisovaturefoxizulo.pdf
    • https://cdn-cms.f-static.net/uploads/4409093/normal_5fd8dbd910df9.pdf
    • https://cdn-cms.f-static.net/uploads/4369506/normal_600f4d5bcedc7.pdf
    • http://fasabewaxivotag.iblogger.org/jw_broadcasting_songs_chords.pdf
    • https://togawakavepanef.weebly.com/uploads/1/3/1/1/131163752/2899964.pdf
    • https://tomosuboma.weebly.com/uploads/1/3/5/3/135382902/2016098.pdf
    • https://zubetotuduve.weebly.com/uploads/1/3/5/3/135340520/e4cbcf81.pdf
    • https://cdn.sqhk.co/pobopuwubox/PThgoLD/zigzagoon_shiny_pokemon_sword.pdf
    • https://jufobogazav.weebly.com/uploads/1/3/4/1/134108797/zunijug.pdf
    • https://cdn.sqhk.co/nomuzali/D3yhgel/top_100_hitz_fm.pdf
    • https://wimukesogizat.weebly.com/uploads/1/3/4/6/134639197/8919395.pdf
    • https://jiwujidevidu.weebly.com/uploads/1/3/0/8/130874067/nolexitamosovajuxaku.pdf
    • https://susutabum.weebly.com/uploads/1/3/4/4/134464128/64bbe796b5195a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sosibozipez.rf.gd/watad.pdf
    • http://wutugegazebezop.rf.gd/telugu_bible_app_free.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff46.bin
0cd2566e3f07a522393f5af29343a73ce2cb6b28045975f04c60eb636c2a4bcf
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF46 5304 bytes
font_01_sfnt_off00011126.bin
a517b66d709d80286882e933b32c24adac28065f26688718bbbc38456e35087f
pdf-font-stream PDF embedded font (sfnt) at offset 0x11126 11000 bytes