Malicious PDF — malware analysis report

Static analysis result for SHA-256 97e1b801a1cca877…

MALICIOUS

PDF

74.8 KB Created: 2021-01-16 11:53:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: c7261054d48db890ff6036ebf97c92af SHA-1: cf02b4892abac25ff3af64e052020b91f61a803d SHA-256: 97e1b801a1cca877bf07a389c39e153aa20ac74798aafebc8d812425972f4658
184 Risk Score

Malware Insights

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

This PDF document contains embedded links that point to known malicious redirector infrastructure, specifically 'https://gettraff.ru/123?utm_term=class+guide+setup+calamity+rogue'. The document's structure and numerous links suggest it functions as a link farm designed to direct users to potentially harmful content. The ML classifier and ClamAV detection strongly indicate malicious intent.

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
  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gettraff.ru/123?utm_term=class+guide+setup+calamity+rogue In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369766/normal_5fb2a5ef3aa08.pdfIn PDF document text
    • https://site-1178359.mozfiles.com/files/1178359/23069527894.pdfIn PDF document text
    • https://site-1174999.mozfiles.com/files/1174999/gif_to_video_iphone_app.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452837/normal_5feced2271226.pdfIn PDF document text
    • https://cdn.sqhk.co/nejajevafode/hbtvemq/restaurant_renovation_contractor_near_me.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421341/normal_5febbeb77d632.pdfIn PDF document text
    • https://site-1214984.mozfiles.com/files/1214984/vegas__com_promo_code_2019.pdfIn PDF document text
    • https://site-1246529.mozfiles.com/files/1246529/whatsapp_status_video_mp4_tamil.pdfIn PDF document text
    • https://site-1171107.mozfiles.com/files/1171107/best_sniper_shooting_hunter_mod_apk.pdfIn PDF document text
    • https://site-1177736.mozfiles.com/files/1177736/bricks_breaker_plus_hile.pdfIn PDF document text
    • https://cdn.sqhk.co/datawafag/jcAiiNZ/best_man_eating_plant_movie.pdfIn PDF document text
    • https://site-1177729.mozfiles.com/files/1177729/mezufimufet.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/napoledunadigo/ellen_foster_study_guide_answers.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_off0000db02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB02 2940 bytes
SHA-256: b255dc2f10caa7cf961bab1172e8a2d2e5e83e097d684c71f73ac3a8f13737b6
font_01_sfnt_off0000e580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE580 5400 bytes
SHA-256: 267b8f88e0722117b3c0530ad5a67d710b056caea24dadf68637515851063aa6
font_02_sfnt_off0000f7cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7CD 11372 bytes
SHA-256: 5fa75ffe4176fdfda411c526f8b664265ad8c0ed87ef73c79c225ade90e912de