Malicious PDF — malware analysis report

Static analysis result for SHA-256 925eb5f9d8d6e706…

MALICIOUS

PDF

79.1 KB Created: 2021-02-27 05:42:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: f76bf63610d87eb47613453c8bf07f3e SHA-1: 3db19eba50de28b761528526f72f76e903455c23 SHA-256: 925eb5f9d8d6e706bfd703a9d625d4a390552c647cbbd667a0223a9c519932a3
104 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, with heuristics indicating the presence of an external URI and an urgency lure. The embedded URL, https://maypoin.ru/strik?utm_term=can+you+cancel+your+twitch+prime+free+trial, is likely the primary destination for the phishing attempt. While no scripts were explicitly extracted, the PDF format can embed JavaScript, which is often used in such attacks to facilitate redirection or exploit delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://maypoin.ru/strik?utm_term=can+you+cancel+your+twitch+prime+free+trial PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366319/normal_5ff5c66ca167c.pdfIn PDF document text
    • http://vas-rem.ru/4641573379047lr7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4531626/normal_5fee38550cb7c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421049/normal_5fcc9e2065ca7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483842/normal_5fe246b6b53d9.pdfIn PDF document text
    • http://beduzevitugok.mypressonline.com/walaluxevo.pdfIn PDF document text
    • http://betmoy54.com/73290373205d7jtp.pdfIn PDF document text
    • http://berkeciftci.net/compare_and_contrast_essay_on_two_pieces_of_art3x006.pdfIn PDF document text
    • http://kvyovk.xyz/boxijewobo855q1.pdfIn PDF document text
    • http://beririka.scienceontheweb.net/santa_rosa_county_bus_schedule.pdfIn PDF document text
    • http://ita-fitness.fun/5920158154872rcn.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/lanubili/dwarf_fortress_adventure_mode_cheat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/mobile_phone_number_uk_format.pdfIn PDF document text
    • https://s3.amazonaws.com/wowonesoribu/samsung_galaxy_tab_2_gt-p5113_charger.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/model_code_of_judicial_conduct_2011.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/42190133610.pdfIn PDF document text
    • https://s3.amazonaws.com/savifin/firex_i4618_manual.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_off0000f668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF668 5176 bytes
SHA-256: 372f54edb1748296bb2cad89e5a3f7f1beae0f3df37a60bb1402ac6d3b5732b1
font_01_sfnt_off000107f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F3 10848 bytes
SHA-256: 3add5c202e401b5168488bb3143e298cd53c25e3b35104a858ce2bc821c11642

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