Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb5fdf5117b90e67…

MALICIOUS

PDF

85.6 KB Created: 2021-03-13 17:15:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df1e2941e4bcb339137d4c8a10624c63 SHA-1: 4a7365d81023a91b9408d031d7b1b0612708744b SHA-256: cb5fdf5117b90e67dad376503b77239299d109a916d1b33313f94283afb9c475
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on Weebly, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards an attempt to redirect the user to malicious content or exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/123?utm_term=personal+vision+statement+pdf
    • https://sajulivos.weebly.com/uploads/1/3/1/1/131164476/nekifus-nuzedus.pdf
    • https://pefuxagofir.weebly.com/uploads/1/3/4/3/134359429/4582220.pdf
    • https://tidukefawa.weebly.com/uploads/1/3/4/8/134851120/9e6bda1.pdf
    • http://adachivia.store/what_to_put_in_a_hurricane_survival_kitjq1ua.pdf
    • http://comforfemj.fun/barber_shop_close_to_me_nowihnrf.pdf
    • http://scandisvet.ru/wuxevifadilijikoxv2rg8.pdf
    • https://kesegupopu.weebly.com/uploads/1/3/4/1/134131766/1773210.pdf
    • https://static.s123-cdn-static.com/uploads/4420260/normal_5ff2ca4f9ad9f.pdf
    • https://static.s123-cdn-static.com/uploads/4393349/normal_6002ba03d6c73.pdf
    • https://laxivaxof.weebly.com/uploads/1/3/0/8/130874385/5866838.pdf
    • https://static.s123-cdn-static.com/uploads/4422912/normal_5ff17c5b85f92.pdf
    • https://static.s123-cdn-static.com/uploads/4470975/normal_5fe3c7e422e7d.pdf
    • http://technodom11.com/nagitudivigejazutodexocw5u9.pdf
    • https://cdn-cms.f-static.net/uploads/4454670/normal_6036d284b6f67.pdf
    • https://lotuvimipel.weebly.com/uploads/1/3/0/7/130739731/7124950.pdf
    • http://wwbook.org/jokarajon0iql3.pdf
    • https://xavexipaw.weebly.com/uploads/1/3/1/6/131636683/filuwobowukezejozef.pdf
    • https://kagivosivozavex.weebly.com/uploads/1/3/4/7/134746508/birotige_mamunavuw_tesefun.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://34e2f0dc-0077-42bd-a047-efa2502e92af.filesusr.com/ugd/8a05ec_083f27ecf0cc43699c393f00e77b6b66.pdf?index=true
    • https://19527f6f-7821-4b33-8e58-d909ab9a203f.filesusr.com/ugd/b18fc6_eb2946913bd44c8daf877428475e85cf.pdf?index=true
    • 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_off000110ca.bin
2a10269cf8f3dc6c2504795b32dc9d45af806ff8fe5f11a81b07b39eb0977536		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110CA 5248 bytes
font_01_sfnt_off00012295.bin
9d29045d902f6b569ad19b226abc457232cb5b09128e7519f72d3799232709c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12295 11252 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.