Malicious PDF — malware analysis report

Static analysis result for SHA-256 005fc9b3c0383d67…

MALICIOUS

PDF

79.9 KB Created: 2020-12-21 00:50:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c5f656c5bbf1edb23c63d65c048ad4ab SHA-1: df27fa20b6236a68db8e3bae09c3805d68bc42d4 SHA-256: 005fc9b3c0383d67ec6cd60a93db6a24885bf31eddaa7893d602e8d4531e89fd
96 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including ML and ClamAV, as malicious. It contains an embedded URL that points to a suspicious domain, likely intended for phishing. The document body is heavily obfuscated, but the presence of the external URI and the overall detection suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafffi.ru/strik?utm_term=omni+notes+foss
    • https://cdn-cms.f-static.net/uploads/4378381/normal_5fbd261a1c2a8.pdf
    • https://cdn-cms.f-static.net/uploads/4381083/normal_5f9de45e3b377.pdf
    • https://cdn-cms.f-static.net/uploads/4375355/normal_5fd3d9d17712d.pdf
    • https://cdn-cms.f-static.net/uploads/4443624/normal_5fd2fa0d79184.pdf
    • https://cdn-cms.f-static.net/uploads/4465392/normal_5fa7574f10635.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/fd3130df-af3d-4586-9280-9c82c245d1f7/seymour_duncan_p_rails_loaded_pickguard.pdf
    • https://s3.amazonaws.com/vizegemawokaxe/86852121338.pdf
    • https://uploads.strikinglycdn.com/files/a8c760b0-7b9a-4017-9b8d-5bc13cf92166/24217672446.pdf
    • https://s3.amazonaws.com/vatakefojunib/sm64_color_code_generator_online.pdf
    • https://uploads.strikinglycdn.com/files/b4172ac0-288e-488d-a743-4c0e33b0dab3/99474273340.pdf
    • https://uploads.strikinglycdn.com/files/0c1a149c-79ed-47b5-9d3d-b154cf457100/reading_exam_3_eso.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd25159135a20848462d54/1606231318777/type_of_hookah.pdf
    • https://uploads.strikinglycdn.com/files/dc9c2b9f-a4a5-4b0f-a0ac-48968326c207/31803092943.pdf
    • https://uploads.strikinglycdn.com/files/20880b08-9455-4991-9bb6-921fb7bf3dd6/52758658637.pdf
    • https://uploads.strikinglycdn.com/files/b3a78ae3-243e-417c-becf-a46649480035/washer_dryer_review.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_off0000dcfc.bin
4253ce374f546ed82c0b962bfad5e193173c5af7311640f7068ccdda2cb38311		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCFC 2960 bytes
font_01_sfnt_off0000e77d.bin
e19d6a97a957b3b7d9850edccbf37465e490689dd5748013b42c39bc4ba586ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE77D 4600 bytes
font_02_sfnt_off0000f715.bin
917d901eea9c5229c7eb58aff360f5932c381265ac83728a7f38702f0692fc40		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF715 11896 bytes
font_03_sfnt_off00011d56.bin
ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D56 16092 bytes

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