Malicious PDF — malware analysis report

Static analysis result for SHA-256 d61f786f1be4dad2…

MALICIOUS

PDF

78.0 KB Created: 2021-03-29 14:45:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 3c2bf117c27ab1b90f1b62f041fe5788 SHA-1: 2580ddd6171a6b8082edd5f01607e6332dc2296c SHA-256: d61f786f1be4dad285824eecb239c470504accfd659883e577b4e578732a8ba6
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, and the presence of embedded URLs indicates an attempt to lead the user to external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://midufefew.ru/strik?utm_term=advocare+24+day+challenge+dessert+recipes PDF link annotation
    • https://cdn.sqhk.co/gobajejuz/gjgphj8/excel_2019_freeze_panes_not_working.pdfIn PDF document text
    • https://cdn.sqhk.co/pijujuweg/hbNZjhN/metal_commando_squad_metal_shooter_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/geruvijiwiw/6DgfhiC/wuwiwixomulekigizuzuvad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452377/normal_601e23f612177.pdfIn PDF document text
    • https://cdn.sqhk.co/pixefavenar/gfSjaBB/36199946379.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459034/normal_603c88adc44a8.pdfIn PDF document text
    • https://cdn.sqhk.co/tivinarafuvu/d0Fhijh/sugadebimux.pdfIn PDF document text
    • https://cdn.sqhk.co/jefapukawore/gfgihhc/63724984927.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383929/normal_6007a7b384134.pdfIn PDF document text
    • https://cdn.sqhk.co/fuzomorikat/hcDhjjf/86082062107.pdfIn PDF document text
    • https://cdn.sqhk.co/pumafuki/HgfgdU6/first_strike_valorant_tournament_liquipedia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366350/normal_60337ec52a3fe.pdfIn PDF document text
    • https://cdn.sqhk.co/sokavuwoz/ih5hiLX/56192223135.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xidatozekef.epizy.com/51976324172.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/former_ashanti_regional_minister.pdfIn PDF document text
    • http://jidowadosul.epizy.com/b._ed_exam_form.pdfIn PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/fajavosu.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/how_to_get_a_220v_outlet.pdfIn PDF document text
    • http://seladetitogar.epizy.com/vanilla_wow_warlock_levelling_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/josirawofeluvidazoduri.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/business_letter_format_book.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/skyrim_xbox_one_mod_load_order_help.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/adobe_photoshop_lightroom_6_trial.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_off0000f09e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF09E 5704 bytes
SHA-256: b887bdbfeae14c72affe21e14ca19b665024fa5840936026d9f1cf0ec0177049
font_01_sfnt_off0001041e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1041E 10760 bytes
SHA-256: dd02204fcebb9b06d0b2fe0df5861eb0116ba24b6f85ef963e07f8fda6bd3b36

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