Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf327a5fd58fa6d1…

MALICIOUS

PDF

156.7 KB Created: 2021-01-16 00:20:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 873b668e53f7a73be640128805925f5d SHA-1: 9659dc9ad95395ed06eadf70bff8b007171f1841 SHA-256: bf327a5fd58fa6d1c14234efd9d3acf4e61c2aadb8e6440ae038ddde3e27b751
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ggtraff.ru'. This indicates the document's primary purpose is to lure the user to a potentially harmful external site. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://ggtraff.ru/123?utm_term=clannad+episode+12+discussion In PDF document text
    • https://cdn.sqhk.co/xafiguzi/igFQigs/straight_talk_home_phone_international_calling.pdfIn PDF document text
    • https://cdn.sqhk.co/masamiwe/hejfD7O/twisted_sister_lead_singer_now.pdfIn PDF document text
    • https://cdn.sqhk.co/rifusofuwedi/cKiieib/quiz_planet_facebook_change_language.pdfIn PDF document text
    • https://cdn.sqhk.co/wotudasigeb/HIjgihh/vinidivil.pdfIn PDF document text
    • https://gixeguxif.weebly.com/uploads/1/3/4/5/134522915/kamenaf.pdfIn PDF document text
    • https://takaranedo.weebly.com/uploads/1/3/4/0/134017801/1032243.pdfIn PDF document text
    • https://cdn.sqhk.co/gekobegij/haLgd1D/tozevufujawevif.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/jotizifime/low_profile_platform_bed_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/38595161163.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/79394103424.pdfIn PDF document text
    • https://s3.amazonaws.com/lezerawe/62373737147.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/guroraj.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/poulan_chainsaw_5020_repair_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/abbreviation_for_example_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000194b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x194B1 49872 bytes
SHA-256: 25012a679a9c3f4aef449ae27551fd4a363ebd88ca5a8a9d2a2108c8a2853cc8
font_01_sfnt_off00022d1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22D1F 5060 bytes
SHA-256: 49063a04ed63d46057619114aff96cee471cc9543872fc0a395e6f8ae9660777
font_02_sfnt_off00023e6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23E6B 11296 bytes
SHA-256: 88e582ca09f79d4cd9fa3323e71353956816edc2ce642655964aca76b658e8ad

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