Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2ca2f136ff33f3b…

MALICIOUS

PDF

79.1 KB Created: 2021-05-07 04:00:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94b60e039c611a82d261c43d682dfe3a SHA-1: e9d3e60364cc6099de7fb6b059792defc58fa030 SHA-256: a2ca2f136ff33f3be45f5ca7c5363e16c5abb0fe8bb4ded45061c352962ea533
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link T1059.007 JavaScript

The PDF document contains a lure related to microphone issues, directing the user to a suspicious URL. The 'SE_CLICKFIX' heuristic indicates social engineering to trick users into executing commands, and the ML classifier strongly flags it as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest an attempt to redirect the user to a malicious site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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=why+isn%2527t+my+mic+not+working+on+pc
    • https://cdn.sqhk.co/zibepidok/RigUdhj/jutokirubiwuxun.pdf
    • https://static.s123-cdn-static.com/uploads/4502698/normal_5fcb56a7803a8.pdf
    • https://cdn.sqhk.co/veleviziwew/fNjeXgh/bajolexij.pdf
    • https://cdn.sqhk.co/pavujakorige/9xhjaKv/ranowuxedipegefagul.pdf
    • https://cdn.sqhk.co/lopumilekana/eIjeSpI/laguwajasegozubaso.pdf
    • http://pivolirarorip.mypressonline.com/letters_of_aristeas.pdf
    • https://cdn-cms.f-static.net/uploads/4365562/normal_60615e8ed8859.pdf
    • http://farozemirig.scienceontheweb.net/duzojuwokes.pdf
    • https://cdn-cms.f-static.net/uploads/4404523/normal_606c8f75ae043.pdf
    • https://static.s123-cdn-static.com/uploads/4488349/normal_5fe383148980e.pdf
    • https://cdn.sqhk.co/xegunorasu/hoYOdhi/69771641648.pdf
    • https://static.s123-cdn-static.com/uploads/4484994/normal_6003711fa41fd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/banula/force_and_motion_worksheets.pdf
    • https://s3.amazonaws.com/wujafivabipo/26390952421.pdf
    • https://s3.amazonaws.com/jinabom/zaleverogaw.pdf
    • https://s3.amazonaws.com/fajixe/dukukuvavuwuxumatebuna.pdf
    • https://s3.amazonaws.com/nawuvud/22951480226.pdf
    • https://s3.amazonaws.com/kukupunopedon/us_passport_renewal_application_form_fillable.pdf
    • http://mifofoxidil.onlinewebshop.net/sociological_perspective_of_religion.pdf
    • https://uploads.strikinglycdn.com/files/6cb23c93-a960-4b79-a03d-c30cb24971bc/xapumujato.pdf
    • https://s3.amazonaws.com/rejiner/can_you_sue_for_emotional_distress_in_new_jersey.pdf
    • http://gozuketitara.onlinewebshop.net/kulonovakudipene.pdf
    • https://uploads.strikinglycdn.com/files/a70f687d-3bb8-4e6f-8a7a-1858e3b3cab4/how_to_use_a_stanley_battery_charger.pdf
    • https://s3.amazonaws.com/fadupazageraf/confidentiality_agreement_sample_template.pdf
    • https://s3.amazonaws.com/degagaziv/10506552980.pdf
    • https://s3.amazonaws.com/guxosa/kinds_of_adjective_worksheet_for_grade_5.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_off0000f6a0.bin
a2edddb337d84f308f8699c6c27d19f8154567b3fb4c49066a2203bc03556f89		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A0 5408 bytes
font_01_sfnt_off0001090c.bin
cf54038b680044f75ae732a28fb9304f619df110304513da452e15dd99cce796		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1090C 10836 bytes

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