Malicious PDF — malware analysis report

Static analysis result for SHA-256 680348b74ae5becf…

MALICIOUS

PDF

82.5 KB Created: 2021-01-30 16:52:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 3b05a617d9996700d4efdcd3cdd73fa5 SHA-1: 1e74c7d1738a2c2cc0d68faee4a334e76b0da797 SHA-256: 680348b74ae5becfb1fb753477fcdcf0c69161fd558771715240dfeb66524d26
116 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating high maliciousness. The 'SE_CALLBACK_LURE' heuristic specifically points to a callback phishing attempt, where the document likely prompts the user to call a phone number. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics strongly suggest a phishing attack designed to trick users into engaging with a malicious actor.

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
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://leonvi.ru/123?utm_term=skyrim+light+armor PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4378381/normal_6004a763f2bb6.pdfIn PDF document text
    • https://cdn.sqhk.co/ributexovek/94hjGhd/vevo_country_music_videos_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/fatidizeru/jvgggcv/srsd_writing_model.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482027/normal_6013afe274546.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406793/normal_5ff1768dcaa98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462096/normal_5fd18375c8bc8.pdfIn PDF document text
    • https://cdn.sqhk.co/pivokazi/86jfjgy/jio_easy_recharge_399.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368486/normal_5fe7932d90ad6.pdfIn PDF document text
    • https://cdn.sqhk.co/woteruzid/4jhhagd/paypal_account_login_canada.pdfIn PDF document text
    • https://cdn.sqhk.co/loboremetoxe/Z8ijVib/80s_music_radio_station_fm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449630/normal_5ff82a7b21649.pdfIn PDF document text
    • https://cdn.sqhk.co/xaripisi/q2MKjfe/radiology_imaging_associates.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421782/normal_5ffaa2e089b50.pdfIn PDF document text
    • https://cdn.sqhk.co/dexasubu/jghjjj3/63574628817.pdfIn PDF document text
    • https://cdn.sqhk.co/xiladuxe/cyhdhdT/50659007205.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414173/normal_5ff78a1818c72.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388046/normal_5ff281506612a.pdfIn PDF document text
    • https://cdn.sqhk.co/lonuxonemor/jdLheSu/difference_between_asteroid_belt_and_kuiper_belt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f81b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF81B 4756 bytes
SHA-256: adbac5ae29a916b3055e9069a5288295219cdaab6ce6f14bd683d0a0ce7bf2c5
font_01_sfnt_off00010834.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10834 11656 bytes
SHA-256: e6019208360e29905f278fa8e07ecbe747d04f8024c3549457d4dec7397b8ba7
font_02_sfnt_off00012ea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EA3 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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