Malicious PDF — malware analysis report

Static analysis result for SHA-256 52af892ed9d90f57…

MALICIOUS

PDF

88.3 KB Created: 2021-04-05 11:03:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f084a138318920dc71a04c4e6a7701fc SHA-1: 94f1c7134d31059e64b68087e13c0cf067a3bf0b SHA-256: 52af892ed9d90f576160ca405f3236f9ca6cf107cfc6784bbe939cd50586ce72
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The embedded URL points to a suspicious domain, likely a phishing site. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jacksth.ru/wix?keyword=pegs+and+jokers+board
    • https://cdn.sqhk.co/xovujiroveg/gghj6jj/vowobivafomememiboli.pdf
    • https://cdn.sqhk.co/bojojiweg/Ghjjbpp/dbz_oozaru_transformation.pdf
    • https://cdn.sqhk.co/tatakakuwito/gjfwYWB/zasuxinatowisuvefunave.pdf
    • https://cdn.sqhk.co/jenetuwuda/s6geEgj/lavukemaje.pdf
    • https://cdn-cms.f-static.net/uploads/4449402/normal_6040a02f68ba1.pdf
    • https://cdn.sqhk.co/sezogitov/cJjihqR/48190264663.pdf
    • https://cdn.sqhk.co/lanuniwa/hgDhiYz/parker_rollerball_pens_amazon.pdf
    • https://cdn.sqhk.co/jidevumedure/jJUhfgi/fun_3d_race_epic_sports_runner_game.pdf
    • https://cdn.sqhk.co/mitebosareki/43DAgjv/93980698107.pdf
    • https://cdn.sqhk.co/bupewazadufa/Gzhf4hi/sozos.pdf
    • https://cdn-cms.f-static.net/uploads/4447101/normal_605c34e06465f.pdf
    • https://cdn.sqhk.co/fulaxanew/jdjd3ic/descargar_musica_de_los_80_y_90_mega.pdf
    • https://static.s123-cdn-static.com/uploads/4453730/normal_6009921d03b3e.pdf
    • https://cdn-cms.f-static.net/uploads/4366653/normal_5fd144c071f37.pdf
    • https://cdn.sqhk.co/duzixulok/dfifmih/lozekilo.pdf
    • https://cdn.sqhk.co/bidusowo/yhbhcV6/xupobagedajimube.pdf
    • https://cdn.sqhk.co/jugomuzuteb/Tkjdiga/vademomal.pdf
    • https://static.s123-cdn-static.com/uploads/4372360/normal_5fdfa34ad5ff3.pdf
    • https://cdn.sqhk.co/raxuzuvuluf/crlXYim/universal_gravity_bong_bowl.pdf
    • https://cdn.sqhk.co/jimavidozeze/gijciai/14033552527.pdf
    • https://cdn.sqhk.co/rifarako/Sfziahd/65503835490.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/92949992-5502-49c8-8855-1028ca7b88ba/93804908735.pdf
    • https://uploads.strikinglycdn.com/files/e1555b1b-c356-4010-b7fc-d5b00662f341/what_is_the_best_car_battery_maintainer.pdf
    • https://uploads.strikinglycdn.com/files/a1c93be1-6252-42a0-bc30-729a30729432/40811110784.pdf
    • https://uploads.strikinglycdn.com/files/54c6b845-dd74-4b40-914c-d45ee136e8c4/46008883093.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011c28.bin
051f16c7015da52bba8d4f8de130bfcbf212cbfd5d25ad80348add82d389c31f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C28 5244 bytes
font_01_sfnt_off00012e15.bin
37b01207f4b5296ad3ec940141fbf4491626a33c6f5cc6364f525e69cb630df8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E15 10548 bytes

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