Malicious PDF — malware analysis report

Static analysis result for SHA-256 316ec35f9086140a…

MALICIOUS

PDF

74.8 KB Created: 2021-02-27 10:42:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab643ad748131f2359ae561ec60c6a2e SHA-1: c93300bf31eca81b3e3c50d5da75987dfc29adac SHA-256: 316ec35f9086140a0449b50ff5511385a5a5fdc09fa161ae021cdfc018f52369
96 Risk Score

Malware Insights

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

The PDF contains an external URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the presence of embedded URLs and the overall detection suggest the document is designed to lead the user to a malicious site, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/strik?utm_term=mirro+pressure+cooker+gasket+m-0512-11
    • https://diriremipujuna.weebly.com/uploads/1/3/4/2/134265666/naforarowur_sokipexip.pdf
    • http://genusadnlo.space/49874223315hgna.pdf
    • http://bottlechainworld.com/71138508786rdn8q.pdf
    • https://tigakivukabor.weebly.com/uploads/1/3/1/1/131164093/5f5da7a65cd2.pdf
    • https://peziwotikiju.weebly.com/uploads/1/3/4/6/134602895/rukibejipefino-pijijekuwu-kasopabe-moguruxiwize.pdf
    • https://cdn-cms.f-static.net/uploads/4474218/normal_602a8fb145e81.pdf
    • http://hrushch.space/94769016542xwkvx.pdf
    • https://cdn-cms.f-static.net/uploads/4472198/normal_6028e54f54dc1.pdf
    • http://izzzaaa.space/366531721107pin9.pdf
    • http://idealica-italiaufficiale.website/watering_can_templatewx5t7.pdf
    • http://limaxinsto.xyz/nuclear_power_plant_project_manager_jobscg6pr.pdf
    • https://gavokafiwafez.weebly.com/uploads/1/3/1/3/131381231/tipuxopajil.pdf
    • https://fitijozis.weebly.com/uploads/1/3/4/3/134372299/90773.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/rorives/wupuxub.pdf
    • https://s3.amazonaws.com/pulavokaxe/high_performance_liquid_chromatography_l_g.pdf
    • https://s3.amazonaws.com/jukezeluf/5411870668.pdf
    • https://s3.amazonaws.com/fekife/809069573.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_off0000e66c.bin
513b6f084f077dfd04455424f1958c06d5c6d76dd529505d1f05fe1265f29acd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE66C 5772 bytes
font_01_sfnt_off0000fa20.bin
d2ad6babeb11d19ec06f9f1c3d681ba2ee8b2b6cc535414eb7c4576a7c98183f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA20 10596 bytes

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