Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2cbacf6c7fa9485…

MALICIOUS

PDF

71.7 KB Created: 2021-06-02 03:18:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c8f254fb8c44360d8f42bb0ef1c9ca10 SHA-1: 1738687f0706a0811fb2ccb9124040158b5c059d SHA-256: a2cbacf6c7fa9485ab4c2c291ca17a05615c777ce0599d169835366d347c9211
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojanized document. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, contains text related to social media engagement, suggesting a lure for phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://crysiq.ru/pbw?utm_term=how+to+get+unlimited+likes+in+tiktok
    • https://static.s123-cdn-static-d.com/uploads/4447916/normal_60b09eba1d684.pdf
    • https://static.s123-cdn-static-d.com/uploads/4460043/normal_60b456bfb0870.pdf
    • https://cdn-cms.f-static.net/uploads/4448746/normal_606e9a0b1a41d.pdf
    • https://static.s123-cdn-static.com/uploads/4474727/normal_5ff0234d9e3d4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e2ccf0cd-0fdf-4987-8f5f-7d23c65067d6/sanakaxenunowisegilaxora.pdf
    • https://uploads.strikinglycdn.com/files/1aedc82f-f464-4505-aa26-05d8c10f3c87/tiziwifefifirilin.pdf
    • http://jitilabajeko.pbworks.com/w/file/fetch/144484665/90704063300.pdf
    • http://lekuzax.pbworks.com/f/fojevekemetenusurideko.pdf
    • http://fepewuwakow.pbworks.com/w/file/fetch/144483801/defining_non_defining_relative_clauses_exercises_b2.pdf
    • http://mefijunov.pbworks.com/w/file/fetch/144425331/what_is_a_mission_statement_example.pdf
    • http://kufavuva.pbworks.com/w/file/fetch/144426513/84776467845.pdf
    • https://uploads.strikinglycdn.com/files/f70f4c8f-9670-49a4-aa61-3a7c710c2e42/manuale_italiano_epson_perfection_v550_photo.pdf
    • https://uploads.strikinglycdn.com/files/2d7105c3-6271-4c87-b498-2a5c87f56cb8/39384507432.pdf
    • https://uploads.strikinglycdn.com/files/597033ac-41de-404b-ac40-ff610184dc76/how_to_set_up_keurig_2.0_water_filter.pdf
    • http://risoxef.pbworks.com/w/file/fetch/144478656/jaferuvo.pdf
    • http://zeladejan.pbworks.com/f/clash_of_clans_best_th9_farming_base_2020.pdf
    • https://uploads.strikinglycdn.com/files/1474dddb-3278-4260-819d-4abd658b5082/how_to_apply_aiou_degree.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_off0000dc8c.bin
24cec804da889be50a325db1f85dd18183947dd137e70cb6ab7c28d5b8e1f503
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC8C 4956 bytes
font_01_sfnt_off0000ed6e.bin
e2d3222c6dd41bcc50430e16013f5a101f0910df3c479e06620ce628b5d8cfc1
pdf-font-stream PDF embedded font (sfnt) at offset 0xED6E 10696 bytes