Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee7c6de5636b26ac…

MALICIOUS

PDF

95.3 KB Created: 2021-03-03 03:27:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 6ef56c01faa32cee9af1f11fd05e1001 SHA-1: 673f8d28f77ff433c812db501b8de45f7c7daed0 SHA-256: ee7c6de5636b26ac632f9add476f27385eb6d60ee24ffbb242f3d87474764a62
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are likely part of a link farm designed to improve search engine rankings. One critical heuristic identified a link to known malicious redirector infrastructure, suggesting the document is used for phishing or distributing malware. The document body, though heavily obfuscated, appears to be a lure related to driver's license requirements.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://crophysi.ru/strik?utm_term=what+documents+do+i+need+to+get+a+compliant+driver%2527s+license+in+ohio In PDF document text
    • https://nimaxosonoj.weebly.com/uploads/1/3/4/8/134897368/wepirebemofew-fojagidemir-dibel.pdfIn PDF document text
    • https://cdn.sqhk.co/gebijowokobe/fhjicgi/robotic_balloon_dog_squeakee.pdfIn PDF document text
    • https://cdn.sqhk.co/sedazozesufu/hiRvYsI/jutusovosevari.pdfIn PDF document text
    • https://wiludexubusut.weebly.com/uploads/1/3/2/7/132740186/4537878.pdfIn PDF document text
    • https://cdn.sqhk.co/zopimoforaja/iY0gejg/vukogubibepidugogatu.pdfIn PDF document text
    • https://cdn.sqhk.co/wofunukasu/cNzt7Mq/krita_drawing_tablet_settings.pdfIn PDF document text
    • https://xinosete.weebly.com/uploads/1/3/0/9/130968926/9821024.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzinipaz/jhgd0ig/pisaruporobelabufow.pdfIn PDF document text
    • https://lizoxezubim.weebly.com/uploads/1/3/0/7/130776499/7305841.pdfIn PDF document text
    • https://cdn.sqhk.co/gesimefav/RjaEjhg/steamboat_springs_hotels_with_pool.pdfIn PDF document text
    • https://cdn.sqhk.co/fefoseto/wjeRjje/kung_fu_hustle_2_trailer_2016.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/lukepepe/reference_letter_template.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/54106339783.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/86802197340.pdfIn PDF document text
    • https://s3.amazonaws.com/fivebo/crayfish_dissection_worksheet_answers_biology_junction.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/97745414535.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/iodometric_titration_with_sodium_thiosulfate_lab_report.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/application_passport_canada_form.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_off00013457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13457 5596 bytes
SHA-256: 631e571c4a6c3a4744ca15b61da61f1839cfb852b09f70fad1d0a7ee24539b31
font_01_sfnt_off0001474a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1474A 11692 bytes
SHA-256: ef6e36e4a1a54a119882aa70ab331d023f539d649a3de47e546b494f36eb585b

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