Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc0273886fe7dc33…

MALICIOUS

PDF

72.7 KB Created: 2021-02-13 16:18:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 542c2822423eb29b1c42fad1e7c376f0 SHA-1: 20cf401add919e8d38bef87079ed198598b40d85 SHA-256: fc0273886fe7dc33abea9a9910731346bb9a187848d174ff89d4339834b514e7
116 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and a machine learning classifier assigned a high probability of maliciousness. The 'SE_CALLBACK_LURE' heuristic indicates the document is designed to trick users into calling a phone number, a common tactic for callback phishing and tech-support scams. While no scripts were extracted, the presence of an external URI suggests a potential attempt to download further malicious content or redirect the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/123?utm_term=death+cure+book+characters PDF link annotation
    • https://cdn.sqhk.co/koxuvusu/hdhfHha/telecharger_real_football_2012_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/tojofelekob/jcjagjl/nesojulumukijo.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/gudukupir/lightning_protection_system_installation_safety_report.pdfIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/spirit_airlines_flight_information_phone_number.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/dovukinem.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/come_on_get_happy_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/xotegugagojudaru.pdfIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/mathematics_all_symbols_name.pdfIn PDF document text
    • https://s3.amazonaws.com/nagudo/wubem.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/88897662926.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/wufemipovovafaxepezufaro.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/hidden_call_recorder_kaise_kare.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/chrome_dev_apk_old_version.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/11928915007.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/scapegoat_theory.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_off0000e06a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06A 5056 bytes
SHA-256: cbe195bc2033a0b9dd5ec57c3f0a0b15d45c1eb65e116476641091374720ffb2
font_01_sfnt_off0000f196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF196 10740 bytes
SHA-256: a7e374118a2d9c93f2cc0e8816893cae498b0bfb89d052da5a73b36296a6585b

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