Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7c92cf9a55a7aa4…

MALICIOUS

PDF

69.3 KB Created: 2020-11-10 00:53:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: ccaeb545f4233ae68e8105d38c807991 SHA-1: 1df57150dd6cc3227f079436fdb59180a3b7db86 SHA-256: b7c92cf9a55a7aa43351789d4876d68d3d74971eb900bb6f901cc844902dd18b
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or credential harvesting attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the presence of a malicious URL and the overall detection profile suggest a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffset.ru/123?keyword=2020+democratic+primary+debate+schedule+time PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366374/normal_5f8d7b7824a97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411916/normal_5fa1cce0256fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415291/normal_5f9fa31a88e8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392195/normal_5fa9c6bb23e61.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/xukonakefules/wringer_washing_machine_motor.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/kufipidefoka.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/milifugako.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/cabildo_significado.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/jivivo.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/convert_adobe_to_word_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/dr._abdul_kareem_sharaf.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/anchoring_script_for_freshers_party_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43cfb470-c812-437a-9001-75fde506dd5e/mortal_kombat_dc_universe_fatalities_ps3.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_off0000cf2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF2A 5736 bytes
SHA-256: 3b5ffa68244a40e913806f719ea522c5b93cf32c89ca0e359e2b5e1fc447ec6a
font_01_sfnt_off0000e27c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE27C 11344 bytes
SHA-256: 2c8dafe5898b0c35c7d114aadfff29817f7d00ddd3d025dec59486d9de6c839d

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