Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ed6641574c68c57…

MALICIOUS

PDF

75.8 KB Created: 2021-03-16 01:03:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aed478e418f95dbf9e6179befa9027f0 SHA-1: dfd92a0b392cba8d0f39557852687b997bbde6db SHA-256: 0ed6641574c68c57077984ff48c3807d325ff090be44130c41b67c4b79c16cac
104 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically identified as a phishing trojan. The document body, though heavily obfuscated, contains references to downloading a PDF, and an external URI points to a URL that appears to be a lure for a free PDF download. This suggests the document is designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://botokaw.ru/strik?utm_term=power+electronics+by+sivanagaraju+pdf+free+download
    • http://aycotoro6.xyz/pdp_wired_controller_for_xbox_one_-_verdant_green_drivervrfcs.pdf
    • http://idealica-tufficiale.website/92394669041norex.pdf
    • http://dukafufuxona.iblogger.org/cable_lateral_raise_proper_form.pdf
    • https://cdn-cms.f-static.net/uploads/4454550/normal_6019d8d1d0ea2.pdf
    • https://static.s123-cdn-static.com/uploads/4387565/normal_5ff9353311e28.pdf
    • https://cdn.sqhk.co/xafumeko/hayiawS/descargar_app_banco_estado_apk.pdf
    • https://static.s123-cdn-static.com/uploads/4465392/normal_5fcff3f03e8d8.pdf
    • https://cdn.sqhk.co/laripikiwafo/hjeokpn/32755616206.pdf
    • https://cdn.sqhk.co/raxizeki/gdgjgcS/juegos_retro_nintendo_switch.pdf
    • http://zabavnyi-slon.ru/evenflo_symphony_dlx_car_seat_installationdrc21.pdf
    • https://cdn.sqhk.co/xotosobupis/eXhdiiG/84978268998.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://8a89c5bc-485b-4808-980c-66c60e8d9908.filesusr.com/ugd/834936_b1da905377fa4b069febdde0ca68a78f.pdf?index=true
    • http://gevalej.epizy.com/keseturanigusoni.pdf
    • http://tebetuv.rf.gd/71356081626.pdf
    • https://26f2e344-8444-46ea-90c9-5a893bcc2fb3.filesusr.com/ugd/b8c837_29fbdda002d2418a98ae5176bdda3423.pdf?index=true
    • https://d09251a9-b09e-4077-8ccb-24037f005f7b.filesusr.com/ugd/a6ce17_7f63568d2eee4b0faa4de259a2968365.pdf?index=true
    • http://tezajiduzut.epizy.com/android_9_samsung_s8_plus_release_date.pdf
    • https://520c840f-7702-4e28-87de-278da5b03b63.filesusr.com/ugd/e633b3_40381934027544ee8ea3749e0c4e6fd2.pdf?index=true
    • https://6f465708-eb37-4ee2-8658-ebeec6cd93ea.filesusr.com/ugd/4bb103_e8ad4550f5db4274a79a0f5218b3f243.pdf?index=true
    • https://3f46bf15-0a8c-4e80-b3e5-a2e3bf90e008.filesusr.com/ugd/8e6e76_a5c9faf343f1451896cc376bd551c6cc.pdf?index=true
    • https://8533cbf3-c0d6-400c-bdf8-8ca38cf0242b.filesusr.com/ugd/135178_0baf412689d04fcf8b7c084220845e14.pdf?index=true
    • 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_off0000e67f.bin
347d41ae5fd5ca59ed4ff6aecc73b8cf47678b9bd3c12179ed40f170b3170ae3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE67F 5796 bytes
font_01_sfnt_off0000fa6a.bin
63eabd455ad61d90dc97f047df8e4e28cfe8b7f209615f57201d6815730b348e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6A 11356 bytes

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