Malicious PDF — malware analysis report

Static analysis result for SHA-256 37f80a6de3d6c56e…

MALICIOUS

PDF

71.2 KB Created: 2020-11-10 11:49:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0bbfa8a755ef1387988cc4d184ba097b SHA-1: 78981605f46a17f6ac7267d7181e529e953815ef SHA-256: 37f80a6de3d6c56e994d51477fff1ff9ee88cff8f48a700cf20981352df1bdff
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The document contains an embedded URI pointing to 'trafftec.ru', which is likely part of a phishing or credential harvesting scheme. The document body, though heavily obfuscated, appears to be a lure related to 'Cookbooks by anthony bourdain'. No scripts were extracted, but the presence of external URIs and the ML/ClamAV detections strongly suggest a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafftec.ru/aws?keyword=cookbooks+by+anthony+bourdain
    • https://vokozigaga.weebly.com/uploads/1/3/4/3/134316184/151a49.pdf
    • https://cdn-cms.f-static.net/uploads/4366302/normal_5f879f8ba436e.pdf
    • https://solezoxi.weebly.com/uploads/1/3/4/6/134654925/038f866.pdf
    • https://rosofofupamufi.weebly.com/uploads/1/3/4/3/134364257/solawasadidikisumezo.pdf
    • https://cdn-cms.f-static.net/uploads/4407081/normal_5f99c0d458a66.pdf
    • https://cdn-cms.f-static.net/uploads/4366661/normal_5f8725a44ba42.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/wukara/ssh_rd_rev04b_iphone_5c.pdf
    • https://uploads.strikinglycdn.com/files/d3482b93-4df6-4e37-83e9-af73539b7a0e/ragnarok_m_hunter_leveling_guide.pdf
    • https://s3.amazonaws.com/retisovojor/scp_079_clearance_level.pdf
    • https://uploads.strikinglycdn.com/files/5d0b7cff-0c22-4cfa-8d19-af4ca3963f38/69042358921.pdf
    • https://uploads.strikinglycdn.com/files/666ca7a8-eeaa-4d91-a2a7-7ee66053e3c1/lemogenuwofenu.pdf
    • https://s3.amazonaws.com/vukusa/secondary_math_3_answer_key.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc68.bin
445409e2d787153bbfafee0e89ebb458572ce78b47d2f0dfe85a8dfb68efda9f
pdf-font-stream PDF embedded font (sfnt) at offset 0xCC68 4976 bytes
font_01_sfnt_off0000dd42.bin
89ccebe533cae39b33c7a98e20ce60f0c490da06a4964416f737f7a81d57a3c5
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD42 10960 bytes
font_02_sfnt_off00010217.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x10217 4324 bytes