Malicious PDF — malware analysis report

Static analysis result for SHA-256 79f836a1fc1cfa20…

MALICIOUS

PDF

65.1 KB Created: 2020-12-18 12:48:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 334ea29d67736865f5ed3120563bb49e SHA-1: 135152b2efb765cc9a01664aea10f3286f246840 SHA-256: 79f836a1fc1cfa2060ca7b9292ae041f735112b08f20c37558d5d95366fcd295
116 Risk Score

Malware Insights

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

The file is a PDF document flagged by multiple heuristics, including ML classification and ClamAV, as malicious and phishing-related. The document body, though partially corrupted, contains text related to 'social security rochester ny phone number', and a heuristic specifically identifies a 'Callback phishing phone lure'. An external URI pointing to 'trafftec.ru' was also extracted, suggesting a potential command and control or redirection endpoint.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://trafftec.ru/strik?utm_term=social+security+rochester+ny+phone+number
    • https://cdn-cms.f-static.net/uploads/4454163/normal_5fd7c4e86dc54.pdf
    • https://melesosinipedo.weebly.com/uploads/1/3/4/4/134475371/8495583.pdf
    • https://static.s123-cdn-static.com/uploads/4467564/normal_5fca5ed03015b.pdf
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/4009148.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/6d7938ff-a656-4508-8c41-4c5b813028e5/bowflex_manual.pdf
    • https://s3.amazonaws.com/zevutebulaworel/affidavit_template_indiana.pdf
    • https://s3.amazonaws.com/rimepusox/dcfs_medical_form_for_teachers.pdf
    • https://s3.amazonaws.com/benuka/marketing_manager_interview_questions_and_answers.pdf
    • https://uploads.strikinglycdn.com/files/0eed5fc7-cfd4-4396-aaf2-6c234a406a4e/luzevirazunuvotu.pdf
    • https://s3.amazonaws.com/ritoma/30487020113.pdf
    • https://uploads.strikinglycdn.com/files/c21e0a41-6d73-4ec7-a2fc-2e062bb968d3/anna_azerli_images.pdf
    • https://s3.amazonaws.com/zebarufuridorur/anti_magic_academy_novel.pdf
    • https://uploads.strikinglycdn.com/files/6c08c8fd-2270-42fc-aa09-d34015242b10/blank_guitar_chord_chart.pdf
    • https://uploads.strikinglycdn.com/files/464503f6-8c81-45a7-85ae-06a21a851f63/vx7022_user_manual.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_off0000c29e.bin
75448b31420ffbbf9dd729dc86fe31013d1de31eecea8b8c14e166d6b1b10194
pdf-font-stream PDF embedded font (sfnt) at offset 0xC29E 5520 bytes
font_01_sfnt_off0000d53e.bin
ecc38b02f86c38868a301c972a5ccad8db9b14085aae1e0e46597f189ab4039e
pdf-font-stream PDF embedded font (sfnt) at offset 0xD53E 10044 bytes