Malicious PDF — malware analysis report

Static analysis result for SHA-256 d049b41de7e20dda…

MALICIOUS

PDF

83.1 KB Created: 2021-02-24 03:50:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: bf3ab801b03a2a139dc9b0fa160c8c15 SHA-1: 85190e178e53a0ffb6f9bd58a50c431506a69db4 SHA-256: d049b41de7e20dda413644edb20137433a1bc9e5486e420738f1b1e6cd221791
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains embedded URLs, one of which, 'https://jottigo.ru/strik?utm_term=family+tree+format+pdf', is flagged as suspicious. The 'SE_INVOICE_LURE' heuristic suggests the document uses a fake invoice or payment theme to trick the user. Although no scripts were explicitly extracted, the PDF structure and the presence of external links indicate it likely serves as a lure to download a second-stage payload, potentially exploiting a client execution vulnerability.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://jottigo.ru/strik?utm_term=family+tree+format+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4457305/normal_5fe27a8b00f83.pdfIn PDF document text
    • http://rollernefritmassage.xyz/42051853437ag5k.pdfIn PDF document text
    • http://naturapple.space/whistler_inspection_camera_with_2.4_monitorz8ee8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468831/normal_60088ca622625.pdfIn PDF document text
    • http://cleanup-sale.site/diferentes_zonas_de_la_llama_del_mecherogzcvh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371272/normal_5fcc6af715fb7.pdfIn PDF document text
    • https://cdn.sqhk.co/famazipow/AHx2hjX/dream_daddy_dadsona_creator.pdfIn PDF document text
    • http://money-team.site/color_switch_on_scratchhl004.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450138/normal_60246eaa39dfc.pdfIn PDF document text
    • https://cdn.sqhk.co/jagibuvat/giHgck4/adderall_lyrics_popp_hunna_genius.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505837/normal_6018cbb6c3f83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451750/normal_5fd646ee400d0.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/wamatasamegu/12963963605.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/brick_game_pro_apkpure.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/jijegivozowopiziwunuvarit.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/best_wallpapers_for_android_2019.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_off000109d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109D2 5068 bytes
SHA-256: 176f9cdc12bbbb659b625f107ea09bf20550cc59ad6f061dc89c3475519ae463
font_01_sfnt_off00011b07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B07 10628 bytes
SHA-256: 2e6d366d9630e66ef7fe1566ce4a8fac42ac826c694bd06ec7a31346a04ede83

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