Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfe5ef8d40a610fa…

MALICIOUS

PDF

72.3 KB Created: 2020-12-28 21:44:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 51c77edac940ccfaf10d01c9a338bfa4 SHA-1: 750a532ab350050d7a0972184e969198f7d16ce1 SHA-256: bfe5ef8d40a610fa61c203f17fc62c3f6b0379f7c093afd8b1c3e70b09d33e07
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains embedded URIs, with the primary one being `https://trafficel.ru/strik?utm_term=tanglefree+goose+decoys+reviews`, which likely leads to a phishing or malware distribution site. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of external links strongly suggests a phishing or redirection attack.

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://trafficel.ru/strik?utm_term=tanglefree+goose+decoys+reviews PDF link annotation
    • https://cdn.sqhk.co/keserina/ifhiYii/48719044663.pdfIn PDF document text
    • https://cdn.sqhk.co/kedezoge/hakN7ij/dot_to_dot_puzzles_online.pdfIn PDF document text
    • https://cdn.sqhk.co/waximanodif/Nidia6I/communism_vs_capitalism_cold_war.pdfIn PDF document text
    • https://cdn.sqhk.co/bafebolabefo/ggg0Nih/80323313315.pdfIn PDF document text
    • https://cdn.sqhk.co/xidosisew/iuzhiiQ/37916042982.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/a604d31b-9825-4b29-bf6d-44517316c015/sudonituse.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/96004053754.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/android_9_google_account_manager._apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04e93a7e-82fb-4fc6-be59-86d9b5a69a76/contabilidad_basica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84f6e1dd-f008-4cfd-8188-7c8b93c8615c/kustom_signals_golden_eagle_radar_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/pdf_split_ubuntu_18._04.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1169940f-a3c0-435d-8ba4-db27236ceda7/97352626872.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/227c37e8-d026-457a-a7a9-332c9401bfb6/st_louis_mugshots_63123.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_off0000da24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA24 5392 bytes
SHA-256: d79c5952a95ac11bb29a9020d5c31c17e0cf4e1421111e3e8f0e4e2ea8a5fe9e
font_01_sfnt_off0000ecaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECAA 11256 bytes
SHA-256: f93c954de7ea0799be996026bc58a249ee2230b707c0714fb0a75f17e03280ec