Malicious PDF — malware analysis report

Static analysis result for SHA-256 b86e150c889b664c…

MALICIOUS

PDF

61.5 KB Created: 2020-11-10 14:45:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2b3e083598ccac9fa5822ad1969d5c3 SHA-1: dea25e38d800b003aae483f2397fc61f6cc3a075 SHA-256: b86e150c889b664c43f7fecb7aefd00ec919117fd6cd6ff2a6a7694e22ce28a4
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one pointing to known malicious redirector infrastructure. The heuristic firings indicate this is a malicious redirector and part of a link farm, suggesting the document's primary purpose is to drive traffic to potentially harmful sites. Although no scripts were explicitly extracted, the presence of embedded URLs and the ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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://gettraff.ru/123?keyword=713-345-1098%253D-730+is+true
    • https://fexejolimoti.weebly.com/uploads/1/3/4/1/134131812/fobolavenano_vosukuzolo_tinuratiropaje.pdf
    • https://mabanopovofed.weebly.com/uploads/1/3/1/4/131453130/zumobewub-xunupewodew-suside.pdf
    • https://cdn-cms.f-static.net/uploads/4413368/normal_5fa96ee4d5026.pdf
    • https://cdn-cms.f-static.net/uploads/4403560/normal_5fa4efcbce1d1.pdf
    • https://cdn-cms.f-static.net/uploads/4376362/normal_5f963a8ad97cf.pdf
    • https://cdn-cms.f-static.net/uploads/4386091/normal_5fa18a76b34e3.pdf
    • https://cdn-cms.f-static.net/uploads/4393911/normal_5fa768447d0ed.pdf
    • https://mejebepagomuda.weebly.com/uploads/1/3/4/4/134494428/e9a57.pdf
    • https://bukusafirede.weebly.com/uploads/1/3/4/2/134266240/6272130.pdf
    • https://ralututoj.weebly.com/uploads/1/3/4/4/134457658/5352242.pdf
    • https://gikoberi.weebly.com/uploads/1/3/0/9/130969260/3523272.pdf
    • https://cdn-cms.f-static.net/uploads/4369329/normal_5f8fb78c9161c.pdf
    • https://widufosonetorif.weebly.com/uploads/1/3/4/5/134598319/mizeviwe-dasudotilaludaz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dovulavavo/neririka.pdf
    • https://s3.amazonaws.com/wivunonovef/john_cena_autograph_pic.pdf
    • https://uploads.strikinglycdn.com/files/af922b88-f466-47db-923e-f7509955f7f1/shantae_half_genie_hero_trophy_roadmap.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_off0000b54c.bin
0b01522025bcb0bf27230d12b0ead98e022c090fe807193517ca12ac093fb09e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB54C 5420 bytes
font_01_sfnt_off0000c7e8.bin
c537fa0eabe2c67ba72284b53e96c86555707773bba965fd4277b3693fabb46e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC7E8 9792 bytes

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