Malicious PDF — malware analysis report

Static analysis result for SHA-256 980fb23256c6c821…

MALICIOUS

PDF

67.4 KB Created: 2021-06-10 02:48:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 182054e2be6836534227e81e52ed3436 SHA-1: ca66079d153f001d42dbe6e064da110caa926ddf SHA-256: 980fb23256c6c82151dd8c492ea51fe9549c7c503f385de594ae3145ca4b2971
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or redirection mechanism. The presence of embedded URLs and the overall structure point towards an attempt to direct users to potentially harmful external content, likely for phishing or malware distribution.

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://synerhu.ru/pbw?utm_term=avengers+endgame+putlocker
    • https://gibitiwatu.weebly.com/uploads/1/3/0/7/130776060/222f5f.pdf
    • https://fabupegux.weebly.com/uploads/1/3/4/6/134689396/8285843.pdf
    • https://vaxofawaz.weebly.com/uploads/1/3/2/6/132682661/7f1273178de.pdf
    • https://cdn-cms.f-static.net/uploads/4500674/normal_603a416ba486a.pdf
    • https://faboduvo.weebly.com/uploads/1/3/5/3/135343103/mikedojekase.pdf
    • https://cdn-cms.f-static.net/uploads/4376088/normal_605992dc1b949.pdf
    • https://cdn-cms.f-static.net/uploads/4443576/normal_60240ec59717d.pdf
    • https://cdn-cms.f-static.net/uploads/4369664/normal_604ddb13e131b.pdf
    • https://larulukesulugu.weebly.com/uploads/1/3/4/3/134305666/5361301.pdf
    • https://static.s123-cdn-static.com/uploads/4450641/normal_5fce03d4d9e4e.pdf
    • https://cdn-cms.f-static.net/uploads/4453720/normal_604ada3bc2256.pdf
    • https://static.s123-cdn-static.com/uploads/4383300/normal_5ffd3ab407253.pdf
    • https://juxatameserog.weebly.com/uploads/1/3/0/9/130969062/97e0b5.pdf
    • https://cdn-cms.f-static.net/uploads/4369909/normal_5fdb9d7fd0a17.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xojipoxar.pbworks.com/f/sagapofapo.pdf
    • http://zatesil.pbworks.com/f/doduweledagebamavenavolu.pdf
    • http://dobifapig.pbworks.com/f/clicker_heroes_outsiders_guide_2018.pdf
    • http://kibumezi.pbworks.com/w/file/fetch/144711360/61626056196.pdf
    • http://furalagaposu.pbworks.com/w/file/fetch/144559164/pioneer_sx_1080_vs_1050.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_off0000c823.bin
9f589c7d4e52835c955305008064500a72d703853707162ec91359fe39980390		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC823 5504 bytes
font_01_sfnt_off0000dad2.bin
420f0ce727e76385a44fecb46efc6620e066bf88b664b6bc45e589445d317b82		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD2 10972 bytes

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