Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd575a287241e755…

MALICIOUS

PDF

77.4 KB Created: 2021-03-12 11:36:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84c75cf3b0738ed09b92cf8211905b5f SHA-1: 7a94d75447e562c2a4fb402f6bf005603855940a SHA-256: fd575a287241e7556518ab96138537bafc46e29ebc6314185c5ff230619b18b1
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or distribution mechanism. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to potentially 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://druttle.ru/award?keyword=bathala+and+the+story+of+creation+pdf
    • https://static.s123-cdn-static.com/uploads/4489440/normal_5fcdc76b95941.pdf
    • https://jofilelaritavux.weebly.com/uploads/1/3/4/1/134108607/wajudujizigeromopilu.pdf
    • http://bit7.top/cheerleading_uniforms_custom_designnf6yp.pdf
    • https://static.s123-cdn-static.com/uploads/4479942/normal_6000ff3043057.pdf
    • https://static.s123-cdn-static.com/uploads/4478383/normal_5ff49d5030c74.pdf
    • http://flowerport.market/the_old_monk_who_sold_his_ferrari_summary1acmi.pdf
    • https://cdn-cms.f-static.net/uploads/4456378/normal_602ef504ebebe.pdf
    • https://static.s123-cdn-static.com/uploads/4417045/normal_5ff2bc789f1e6.pdf
    • https://cdn-cms.f-static.net/uploads/4415304/normal_6032ae2eca8b3.pdf
    • https://static.s123-cdn-static.com/uploads/4470209/normal_60055f4819c14.pdf
    • https://cdn-cms.f-static.net/uploads/4428052/normal_602b8c2f5060f.pdf
    • https://cdn-cms.f-static.net/uploads/4369511/normal_5fdab4b4befc4.pdf
    • https://static.s123-cdn-static.com/uploads/4393183/normal_5fdf2e149ee04.pdf
    • http://winoorama.site/player_unknown_battlegrounds_free_pc_apkne28i.pdf
    • https://static.s123-cdn-static.com/uploads/4414159/normal_60006dde77326.pdf
    • https://bulugigedi.weebly.com/uploads/1/3/4/7/134714886/9cb0b1cf8bc38a2.pdf
    • http://tublitalia.space/46375507072iiu17.pdf
    • https://zeteleginogegop.weebly.com/uploads/1/3/4/5/134526156/2776520.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0000f1d0.bin
ebca677bd1f1057224812d3e0db3e844e13b0555eda5e28b7a8e520596f85ec0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D0 5396 bytes
font_01_sfnt_off0001042e.bin
213d27194b96bba1108f9ad253fc08d03a168d7240b038432202a7922a03c677		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1042E 10548 bytes

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