Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f129a3d9df09a7f…

MALICIOUS

PDF

71.5 KB Created: 2020-12-17 14:42:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18fa2b4c5df62c9532cfb67db7dac73a SHA-1: be6c9e817876ceabf4968f3885c64eb57d2d6bcc SHA-256: 6f129a3d9df09a7f6e9cb82f613f6bd2ede0d943b4f7a4dbef1312f8ed5f535e
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, which is likely used to host a phishing page or download a secondary payload. The PDF structure itself does not contain readable text, but the presence of an external URI and the ClamAV detection strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://trafficel.ru/strik?utm_term=all+drive+forms+kh2
    • https://gutomaxitokivi.weebly.com/uploads/1/3/1/3/131383747/1591764.pdf
    • https://koxabiwepa.weebly.com/uploads/1/3/4/3/134309970/xediboginudalu-kanizikul-naweliwek.pdf
    • https://jiwedizuku.weebly.com/uploads/1/3/4/3/134310564/3be2803.pdf
    • https://wusunipusu.weebly.com/uploads/1/3/4/3/134320006/7410925.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/9c003618-eae3-4595-80b8-8127265464ff/kabaneri_of_the_iron_fortress_kissanime.pdf
    • https://uploads.strikinglycdn.com/files/3359c54c-a3e6-4182-a697-914bd245ca4f/xizoresoboxerobi.pdf
    • https://s3.amazonaws.com/votuweroxigezog/manual_for_th8321wf1001.pdf
    • https://static1.squarespace.com/static/5fc65200ea4a794d566a2ee3/t/5fd156cf23f2866aa3794d00/1607554767986/angry_neighbor_pc.pdf
    • https://s3.amazonaws.com/medaliwifufugel/rexuri.pdf
    • https://uploads.strikinglycdn.com/files/7d456eaa-9a1b-4e3b-9d2b-8740be81cbd8/internal_combustion_engine_parts_and_functions.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_off0000dc87.bin
88701255ceb9447c631b4a7ed74b0bf1bf988bef2b1d65b660b8082764c2d6c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC87 5184 bytes
font_01_sfnt_off0000ee0a.bin
2cc9b49a0ff03244958474f32d5f797040c62282dae1d5531a7cb6546f3a96d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0A 10324 bytes

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