Malicious PDF — malware analysis report

Static analysis result for SHA-256 42793c72d5e2526c…

MALICIOUS

PDF

63.0 KB Created: 2020-12-31 02:17:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4787b5e2910e6c59519b085b18a9ef9 SHA-1: 1ec916f2637c269ff7ffea6e73941880057d4b1d SHA-256: 42793c72d5e2526c6293a7c13074fdb2ee695ba64c0f1e20e77210a72ace2124
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'trafffe.ru', which is likely a malicious domain used for phishing or distributing further malware. The document body, though heavily obfuscated, contains keywords related to game hacks, reinforcing the phishing lure.

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://trafffe.ru/strik?utm_term=bloons+td+6+monkey+money+hack+pc
    • https://cdn-cms.f-static.net/uploads/4373517/normal_5f8d7ec372501.pdf
    • https://vanakiti.weebly.com/uploads/1/3/5/3/135323710/c4e50.pdf
    • https://cdn-cms.f-static.net/uploads/4366402/normal_5f96839496221.pdf
    • https://lukidamovepuk.weebly.com/uploads/1/3/1/4/131437538/potokikatoz.pdf
    • https://static.s123-cdn-static.com/uploads/4468261/normal_5fed17432d989.pdf
    • https://cdn.sqhk.co/womibakok/yR3jajj/vegan_diet_for_weight_loss_7_day_plan.pdf
    • https://cdn-cms.f-static.net/uploads/4390996/normal_5f91fc27cff6f.pdf
    • https://cdn-cms.f-static.net/uploads/4370275/normal_5fd6ccff6e4c5.pdf
    • https://cdn.sqhk.co/jumupebuvi/avauhaG/josanunejabasosatupojek.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b0b87f29-ac1a-4c69-8ef3-ce7561a0dd66/bike_race_pro_mod_apk_7.7.20.pdf
    • https://uploads.strikinglycdn.com/files/0d72e15d-c093-4924-b118-c513a26c97c2/best_survival_axe_reddit.pdf
    • https://s3.amazonaws.com/wewuxuviwar/biology_introduction_to_genetics_worksheet_answers.pdf
    • https://s3.amazonaws.com/zafaronivaj/designer_resume_templates_psd.pdf
    • https://uploads.strikinglycdn.com/files/467cccf8-3944-4190-aba9-7c7f796b2d17/kubota_zd326_operators_manual.pdf
    • https://s3.amazonaws.com/woxotopapozokev/highway_bike_racing_game_uptodown.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_off0000b99a.bin
54beaa2dcffa067c018b32367e2714402090c1b5d9f1ffe1ced6717daacce232
pdf-font-stream PDF embedded font (sfnt) at offset 0xB99A 5584 bytes
font_01_sfnt_off0000cc81.bin
737123073eec0ced9138a7136f517a749ee161e337081e4b05cb3fac182ed763
pdf-font-stream PDF embedded font (sfnt) at offset 0xCC81 10136 bytes