Malicious PDF — malware analysis report

Static analysis result for SHA-256 27a9d2443248fbff…

MALICIOUS

PDF

90.6 KB Created: 2021-02-15 08:30:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e0d9d64f236de157d4771e57738ca755 SHA-1: d504a5b19d15aa793d8bd360eaacd6b961f4fde4 SHA-256: 27a9d2443248fbff1fa42f670c9aca049c0f45d13b37d0ba83f2d8d675ad6784
116 Risk Score

Malware Insights

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

This PDF file 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 strongly suggests the document is designed to trick the user into calling a phone number, a common tactic for callback phishing or tech-support scams. While no scripts were extracted, the presence of an external URI and the overall detection profile indicate it likely serves as a lure to a malicious site or to initiate a fraudulent interaction.

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://baarspo.ru/123?utm_term=central+florida+highland+games PDF link annotation
    • https://cdn.sqhk.co/janonaset/YGnighe/bajimudomevimiwonelifit.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428341/normal_5ff4373d73baa.pdfIn PDF document text
    • https://cdn.sqhk.co/rifojimuna/b5jb2sa/teton.pdfIn PDF document text
    • https://cdn.sqhk.co/veletafi/ahfhjjh/76194598129.pdfIn PDF document text
    • https://cdn.sqhk.co/depadukat/xGiinhe/train_station_railroad_transport_line_simulator_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501028/normal_6019dbd088305.pdfIn PDF document text
    • http://kifenefazujiz.iblogger.org/dolukemejejobugiwam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450147/normal_6001ca7592ec6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485800/normal_60209b6ee0b3b.pdfIn PDF document text
    • https://cdn.sqhk.co/fodexuxefeba/jbUfgr4/coin_collection_storage_uk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459625/normal_5fe92d809ab62.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446944/normal_6007d09de7681.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00011fe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE8 5228 bytes
SHA-256: e947a922c0b50b7a29da71b44bdf47bf19d35542593b8995065e013fc5c2226c
font_01_sfnt_off00013181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13181 14508 bytes
SHA-256: 0a4776e8e02792d75dc62b8d3c71cec80d51e45d5425632721ae20502996efc9

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