Malicious PDF — malware analysis report

Static analysis result for SHA-256 3345d7f1dc794fad…

MALICIOUS

PDF

84.4 KB Created: 2021-01-09 16:36:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 45f084c09e738ad55e75714a04c23e87 SHA-1: c88ecabf060f8d5fc04df2117f9dca7bfd98e1d7 SHA-256: 3345d7f1dc794fada175a15972eb6fab74d0744cc16bade6c6d652b6e1b78029
214 Risk Score

Malware Insights

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

The PDF contains a link farm with 22 external links, including a critical redirector link to 'traffine.ru'. This indicates a phishing or scam attempt, likely to distribute further malicious content or lead users to fraudulent sites. The ML classifier and ClamAV detection strongly support its malicious nature.

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://traffine.ru/aws?utm_term=accredited+investor+form+dbs In PDF document text
    • https://wawaxotev.weebly.com/uploads/1/3/4/3/134368025/41c35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473654/normal_5fc17162e7a25.pdfIn PDF document text
    • https://poxuroli.weebly.com/uploads/1/3/0/7/130738943/getubeda.pdfIn PDF document text
    • https://xibuderopugef.weebly.com/uploads/1/3/4/0/134042602/1513155.pdfIn PDF document text
    • https://dolopexoje.weebly.com/uploads/1/3/1/8/131872138/vepotupeba_wutonevaz.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/6034fbea-d12c-4719-8d9f-27544ffd3ce8/61459059668.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/48965240832.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/free_german_reading_books_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/9790939151.pdfIn PDF document text
    • https://s3.amazonaws.com/fisulefajow/insect_life_cycle.pdfIn PDF document text
    • https://s3.amazonaws.com/legipalofi/powerpoint_templates_free_school_theme.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_off00010db0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB0 5116 bytes
SHA-256: 969e4af808eb2969bcb84acfb7f73495232785db1f5e7da2ebd5f71b5a636772
font_01_sfnt_off00011f09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F09 11044 bytes
SHA-256: b7f46c0e17611973fa1a7cc64f87bb4a66abefd8c77bde04e03b63df5b9fa7a4

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