Malicious PDF — malware analysis report

Static analysis result for SHA-256 27b1f4bb9851dc3d…

MALICIOUS

PDF

80.7 KB Created: 2021-01-03 03:38:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e89c07e836d47995a590081da97f1b0 SHA-1: d5bd6d4f4a8f69c70f12af5cc5d1ab8395e03163 SHA-256: 27b1f4bb9851dc3dbe465cc7b399b9367486abcd878e4e6116f92ac3d7ca03d9
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as malicious by a ClamAV signature (Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0) and an ML classifier. It contains an external URI pointing to a domain associated with wage survey templates, suggesting a phishing or social engineering lure. The presence of a download button heuristic further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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?utm_term=wage+survey+template
    • https://cdn-cms.f-static.net/uploads/4366020/normal_5fb590a216038.pdf
    • https://cdn.sqhk.co/semejegofip/j2Uidig/star_cannon_master_mode.pdf
    • https://cdn.sqhk.co/veleviziwew/fibiaij/75663466067.pdf
    • https://cdn-cms.f-static.net/uploads/4414494/normal_5fb30c7592c5d.pdf
    • https://cdn.sqhk.co/wunokebewoz/Vnc9Czw/warhorn_adventurers_league.pdf
    • https://cdn.sqhk.co/boketumejipa/jbqidjg/xojalalegajuguxe.pdf
    • https://cdn-cms.f-static.net/uploads/4370540/normal_5f8edad989ce1.pdf
    • https://cdn.sqhk.co/wirumedaba/jbhigdq/extreme_landings_mod_apk_obb.pdf
    • https://cdn-cms.f-static.net/uploads/4404983/normal_5fa61e4751f78.pdf
    • https://static.s123-cdn-static.com/uploads/4475989/normal_5fee67f48e02f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/mokamoba/bounty_hunter_prospector_metal_detector_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1ee.bin
3decea7113899323f2f62dbbf8ac84de8f2b85cc730d3f6db6b2a408b33f2cf0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1EE 4932 bytes
font_01_sfnt_off000102ca.bin
570f2cbd83ea9ad49117d9d4b9f26aa58234fcd62f7393caee9a476e68cec49e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102CA 10952 bytes
font_02_sfnt_off0001280b.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1280B 4324 bytes

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