Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed4b82e91d2629ea…

MALICIOUS

PDF

81.4 KB Created: 2021-04-29 17:56:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 9e9de10e9659f7070ca0b898dbb25dff SHA-1: bb70f91dfecee7c0ba04e83f8ea4a680164925d0 SHA-256: ed4b82e91d2629ea0d62f1cab23dc9400d57ef9beb8e8b4947f6b6d12cd697d6
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by heuristics as a potential phishing or malware distribution lure. The document body, though heavily obfuscated, contains text related to 'walking dead comics' and application metadata, suggesting a social engineering pretext. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/strik?utm_term=buy+all+the+walking+dead+comics PDF link annotation
    • http://rocketdocs.us/troy_bilt_trimmer_owners_manual8gxy0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495246/normal_6024fc4be7558.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383146/normal_6029e3074710a.pdfIn PDF document text
    • https://cdn.sqhk.co/bopelara/icnhhaK/where_to_buy_pumpkin_carving_tools_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/dubutemaruxu/hiiggdI/ball_holen_hund.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500667/normal_600e452ad2965.pdfIn PDF document text
    • http://dom-bita.org/mibenepuzolusapuxitajifaljjr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tutasujal/how_do_you_write_a_good_career_development_plan_for_yourself.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/when_did_the_magna_carta_end.pdfIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/this_feeling_chainsmokers_song_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/82446768981.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/esl_library_applying_for_a_job.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/recuento_de_enterobacterias.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/how_to_buy_shares_in_singapore_airlines.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/10820339928.pdfIn PDF document text
    • https://s3.amazonaws.com/zoxewudunigus/gofegenenivij.pdfIn PDF document text
    • https://s3.amazonaws.com/popilo/71399105546.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/ruzakuzefale.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/american_college_of_radiology_clinical_practice_guidelines.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7C 5564 bytes
SHA-256: ba322ec83f342c26a1cf2500b9019563aa6596c9f1ae02dbf333f96d690d4453
font_01_sfnt_off00011260.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11260 11272 bytes
SHA-256: c1b7ca274928c86c33be7e0db7db70b4fc3a4f7ef1466ab4d524b4324ba29b00

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