Malicious PDF — malware analysis report

Static analysis result for SHA-256 c46c32b098192ba6…

MALICIOUS

PDF

70.3 KB Created: 2020-11-24 23:51:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 0a8cf2c590805a7666c7eb127ee7ab32 SHA-1: eb6c287f227923fcbd60d9129135795fa5897034 SHA-256: c46c32b098192ba646d5cc57eccb9e292c1a8af2909d73471d87088c036432f6
216 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 as malicious, including ClamAV and an ML classifier. It contains a link farm and an SEO redirector pointing to 'https://traffset.ru/strik?utm_term=bruce+barry+vanderbilt', suggesting a phishing or malware distribution attempt. The presence of embedded URLs and the overall structure indicate it's designed to trick users into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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) or Microsoft license-boilerplate 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://traffset.ru/strik?utm_term=bruce+barry+vanderbilt PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371553/normal_5fb863933bf06.pdfIn PDF document text
    • https://jamafijuzu.weebly.com/uploads/1/3/1/4/131437216/2568472.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372354/normal_5fa4d9c8b17f3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/541c4e84-77dc-4708-9a87-7e60abe49e9a/30346661341.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c708a57-99fc-4f8f-8017-e2c28ce61f48/significance_of_the_study_example.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/brown_dragon_dd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ea19757-0953-4a70-b849-8867ec73c0bb/fungi_identification_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/takurugilij/pogoliluzila.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/vovukevewapatikegozedoz.pdfIn PDF document text
    • https://s3.amazonaws.com/xanofamaja/is_cps_24_hours.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae5ce3e7-b043-43cb-9d27-08da1e434136/manual_de_brujeria.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/38577495755.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/weather_underground_pell_city_al.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4fefd64-3264-4978-bb88-ecd13a74aa7d/20034027683.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/piriformis_muscle_pinching_sciatic_nerve.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_off0000d5cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5CB 5108 bytes
SHA-256: 096778de7c5b458907d5df9a4ce4c0421adf8d445a78d4f2d50d2a7b768d7a44
font_01_sfnt_off0000e744.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE744 11076 bytes
SHA-256: b6c108d480f8800147e845096d2eca446767e3b924436384917980e3ffbb9c32