Malicious PDF — malware analysis report

Static analysis result for SHA-256 206dd7cacf97ed33…

MALICIOUS

PDF

68.9 KB Created: 2020-11-24 05:58:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 014fbabff1fbeaaa789c6b525b208530 SHA-1: 14ae2e3fd61f78e9cb49927121bb2dd1536cecec SHA-256: 206dd7cacf97ed33feaaff565779e678b40cb10773b518b9bb1d65ad9ec36cda
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to Weebly-hosted PDFs, indicative of a link farm or SEO spamming operation. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious sites.

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://trafficel.ru/123?utm_term=pixel+gun+apocalypse+unblocked+76+weebly
    • https://dajoromu.weebly.com/uploads/1/3/4/3/134309711/kapelep.pdf
    • https://cdn-cms.f-static.net/uploads/4373504/normal_5fab3d43e91a7.pdf
    • https://tipefejiri.weebly.com/uploads/1/3/0/9/130969755/2911433.pdf
    • https://cdn-cms.f-static.net/uploads/4477892/normal_5fa6b20de7f6b.pdf
    • https://cdn-cms.f-static.net/uploads/4381104/normal_5f969e7bd0ff9.pdf
    • https://vuguzunorofina.weebly.com/uploads/1/3/4/3/134322364/xupiribukivuf.pdf
    • https://cdn-cms.f-static.net/uploads/4450876/normal_5fbbf9c000d6c.pdf
    • https://sigoxavofilaza.weebly.com/uploads/1/3/4/6/134697452/7687418.pdf
    • https://cdn-cms.f-static.net/uploads/4367312/normal_5f9d93a7ac506.pdf
    • https://topodomero.weebly.com/uploads/1/3/2/6/132696018/vupineso_kadawebapibi_sodovejukol_dafiriru.pdf
    • https://cdn-cms.f-static.net/uploads/4449004/normal_5fad5aca5a85d.pdf
    • https://netaluzubik.weebly.com/uploads/1/3/0/8/130813777/tareguru_tufora_sirebimu_vawibinubabe.pdf
    • https://cdn-cms.f-static.net/uploads/4481993/normal_5fb5b2893277d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a4db70c3-9fb1-4caa-89ec-2121e2044ac4/manual_vw_pointer_2008.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_off0000cd77.bin
f04c43b15fd9b0a3a5caa5985b6ea2e5da22204ef43c0a163ed6a80c7ffd2ce9
pdf-font-stream PDF embedded font (sfnt) at offset 0xCD77 5848 bytes
font_01_sfnt_off0000e19a.bin
d6bdd1bf8e4a4044ddb59a00472d13850ea74f12c5bdb8c7b0356436bdd97aa5
pdf-font-stream PDF embedded font (sfnt) at offset 0xE19A 10892 bytes