Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cd005ad0f6d4497…

MALICIOUS

PDF

72.2 KB Created: 2020-11-13 15:56:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 1d6cd545ed7e0c8d323241d38175dac2 SHA-1: 6b72a35667c498c2fdc738572f8f04f4e3c7236d SHA-256: 7cd005ad0f6d449777e99048c06f6013284cfe37741bc2c694a3bfead4e7554b
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URI pointing to 'trafffi.ru', which is likely a malicious domain used to host or redirect to a secondary payload. The document body, though heavily obfuscated, suggests a lure related to a workout program.

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://trafffi.ru/aws?utm_term=lean+muscle+workout+program+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393186/normal_5fa3209611082.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426953/normal_5f9f40b912008.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a852b80e-c64f-4d8d-b59a-9944f12e5e66/gubuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c200d4fb-4829-4358-b509-f793a16bbf8f/pugelomog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23c310f3-c775-42b6-9011-812718274fa3/luxowekojifive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30828947-e9a8-4f10-9d3e-aa33b9e5ecbd/wildfire_tv_series_episode_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1855326-2192-4d03-85cc-1de979b513be/44306531834.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dca2bbf-0542-4c18-81cc-f6afc10694db/77200140999.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2ff9f7c-3c99-4dee-9ca9-e66a33c3b60d/mojiwese.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4360775-2b14-48a9-bdb8-0e9f858e62b6/73966020685.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ee13091-57d9-4406-8b8d-a3552e10c778/pokemon_tree_of_life.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/213a951d-4a15-4528-a1ac-212870256d9b/57370363429.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA4 5572 bytes
SHA-256: 7610f35dac79aad8e790ec76a683e4c1c1d02f5c820ed4f25eb0a03fe11445fe
font_01_sfnt_off0000ee9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9B 10980 bytes
SHA-256: b9678041e87cdca97bba71a74e850920069eb7d36856639e69700b7bd7955a8c