Malicious PDF — malware analysis report

Static analysis result for SHA-256 d63d8b35c41ad56e…

MALICIOUS

PDF

74.2 KB Created: 2021-03-01 19:01:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: cccc38115f9e63eec8f63d20a0046dc4 SHA-1: 284ad8562f2a36e443fa98c9287d61c9f67cdfff SHA-256: d63d8b35c41ad56ef9f13d3096efaa439f8be920cf7d970e5ed55c4a2818eb10
116 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it contains a callback phishing lure, prompting the user to call a phone number. While no scripts were extracted, the PDF structure and external URI suggest it is designed to deceive users into contacting a malicious entity, likely for financial gain or credential theft.

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
  • 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://soxebez.ru/aws?utm_term=ccure+9000+api PDF link annotation
    • https://cdn.sqhk.co/baresupujar/YThcFLJ/60204348728.pdfIn PDF document text
    • http://blancop.xyz/pudogukevivutofufetobgb1pm.pdfIn PDF document text
    • https://cdn.sqhk.co/wuxaguzifep/GCgdkjb/sopavorararowafel.pdfIn PDF document text
    • https://cdn.sqhk.co/wirowanorax/EjbjfEN/94079744670.pdfIn PDF document text
    • http://cuzinfo.ru/jazumisenabodkhxsr.pdfIn PDF document text
    • http://gnatural.space/smart_board_projector_blinking_red_lightpf77l.pdfIn PDF document text
    • https://cdn.sqhk.co/begokaxawip/ghcjgja/feraxuwok.pdfIn PDF document text
    • https://cdn.sqhk.co/jasurisunav/TjiggzW/lanuwetefikudalaxeke.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/pululusodogi/31549640600.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/sadigetivesirifesamusevo.pdfIn PDF document text
    • https://s3.amazonaws.com/taguxif/54262101394.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/bolero_car_photo_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/blank_piano_sheet_music_paper.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxuxemu/amounts_owed_to_creditors_are_reported_as.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_off0000e7ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7ED 4920 bytes
SHA-256: 936e98e100df878b00f7b7ec129fe46cd3aa7b6b017ae16f4f4cc01ba40bada1
font_01_sfnt_off0000f8b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B4 10396 bytes
SHA-256: 576635cfd7584dda94abf01e86d16b342766305b0e23614cfe1e3798484d1c61

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