Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fca10524c1efd54…

MALICIOUS

PDF

72.5 KB Created: 2020-12-06 04:15:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef1d3b973592f6ea8de255b2a5f07196 SHA-1: 76ea319ac9a5735b142f88b91a48e3026d41484a SHA-256: 6fca10524c1efd543d54b251d2195ab84ca802e19d612c1ef6adcee483b320bc
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document body, though partially corrupted, suggests a lure related to mathematical intercepts. The embedded URL points to a suspicious domain, likely serving as a phishing or malware distribution site.

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=x+and+y+intercepts+of+a+circle
    • https://cdn-cms.f-static.net/uploads/4446931/normal_5faeeaa741a3e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/efd30f17-60f1-4a81-a713-ed43915178db/rugezidatit.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf695f1972c46e3c971e53/1606379871944/city_of_ember_worksheets.pdf
    • https://s3.amazonaws.com/ronatiduzoxij/vavalodarisoxapej.pdf
    • https://uploads.strikinglycdn.com/files/eb1d7bfe-58ab-461a-9fe6-bc1f333b66b8/tony_robbins_book.pdf
    • https://s3.amazonaws.com/tetazino/vowabefuximonunizebuxeje.pdf
    • https://uploads.strikinglycdn.com/files/8334ae24-e7df-42f9-9033-5fe6137cb114/sun_god_lounge_hours.pdf
    • https://static1.squarespace.com/static/5fc7a55bfa9ecc3978a0ab37/t/5fcc0bcf5d2e6f3bda29b024/1607207887727/2738716839.pdf
    • https://static1.squarespace.com/static/5fc67bfc104edf1d77a7a5cf/t/5fc7654609f4d56e8f84cd54/1606903110566/hockey_stick_store_near_me.pdf
    • https://s3.amazonaws.com/bopuxosavubare/half_dragonborn_half_elf.pdf
    • https://s3.amazonaws.com/vidadaviwal/penyakit_jantung_koroner_jurnal.pdf
    • https://s3.amazonaws.com/woxojuxafopuv/47097636935.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bafe.bin
f4774630f2ca57f0a04a5e14f059bfe2e49b2df2a2ca7d755d03017fd3573cd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBAFE 5016 bytes
font_01_sfnt_off0000cc18.bin
1ab9d6d4e632694fe789b8c2cdc0730bba0c1a107e21c770ecdabc64a6e354ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC18 11152 bytes
font_02_sfnt_off0000f244.bin
3a87a2a80cb0740ff7ad33dbd9b35031d90241dfccc5ab96a3d2c3133af9c3ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF244 16096 bytes
font_03_sfnt_off0001070e.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1070E 4324 bytes

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