Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ac792fb5cd1f655…

MALICIOUS

PDF

83.2 KB Created: 2021-04-05 22:10:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d5fc5a8f183c119bf7f1b6f7555125b SHA-1: 737cde460cbf24f4acd943a18f976d21703bee2f SHA-256: 0ac792fb5cd1f65507f685fd9e9aeb7dfd0b99cf4a2318a64ea41916cffebb43
96 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 as a phishing trojan. It contains an embedded URI pointing to 'botokaw.ru', which is a strong indicator of a phishing or malware distribution attempt. While no scripts were extracted, the presence of external URLs and the high confidence threat detection suggest the document's primary purpose is to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://botokaw.ru/strik?utm_term=cal+g+cal+tablet
    • http://zdorovie-vashe-vse.xyz/how_to_replace_hp_officejet_6700_printheadns2vd.pdf
    • https://cdn-cms.f-static.net/uploads/4385848/normal_606a0f1c3c465.pdf
    • http://nudistoff.club/23483439732bco6j.pdf
    • http://tixshopclub.space/how_to_access_wd_my_cloud_from_amazon_fire_stickrjnpu.pdf
    • https://cdn-cms.f-static.net/uploads/4452173/normal_6048f0d43f1d5.pdf
    • https://cdn-cms.f-static.net/uploads/4417648/normal_6026a1a016577.pdf
    • http://20970907.net/99901948305v2nhv.pdf
    • https://cdn-cms.f-static.net/uploads/4490930/normal_602926b524022.pdf
    • https://cdn-cms.f-static.net/uploads/4503387/normal_6014038a931dd.pdf
    • http://shoop-ft.ru/foundations_in_microbiology_talaro2z0js.pdf
    • https://cdn-cms.f-static.net/uploads/4464065/normal_602166baf2048.pdf
    • http://zdsshop.top/machinerys_handbook_31st_edition_download8etgj.pdf
    • https://cdn-cms.f-static.net/uploads/4420592/normal_602000e170562.pdf
    • http://oneitstore.info/tesoxonf422b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/rawesaragegugar/thare_vaaste_instrumental_ringtone.pdf
    • https://uploads.strikinglycdn.com/files/717f03e9-190d-4063-8e34-44e740f12020/dimex.pdf
    • https://s3.amazonaws.com/defipedibe/dungeons_and_dragons_character_sheet_app.pdf
    • https://uploads.strikinglycdn.com/files/e2885e3b-1a82-47ce-a74c-69ef78869b56/plan_de_estudios_2011_primer_grado.pdf
    • https://s3.amazonaws.com/tenunud/27205630930.pdf
    • https://s3.amazonaws.com/zuwimadaneb/sbi_bc_software.pdf
    • https://s3.amazonaws.com/vuxagixil/kimoxilaxujolojaluvuf.pdf
    • https://uploads.strikinglycdn.com/files/da5d7d13-083a-429b-9ebd-6f1156ecc067/fifty_shades_of_freed_movie_download_filmyzilla.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_off0000fcc6.bin
e48573d290b74a57d938cff249473f50bc89147c6f53694f04c5ef39614229f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC6 4380 bytes
font_01_sfnt_off00010bb6.bin
fc9017b89368abe9321622f9d6e288d67661b7b9b2d2d9353d960d250152f2e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB6 11020 bytes
font_02_sfnt_off0001313e.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1313E 4324 bytes

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