Malicious PDF — malware analysis report

Static analysis result for SHA-256 315069f107d56dfa…

MALICIOUS

PDF

66.7 KB Created: 2021-01-01 18:24:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 914b311afcdf7d3c1756c20844083ba6 SHA-1: d451fafa9dcab3cff919ffd3870828002948ecc5 SHA-256: 315069f107d56dfa5486f9347ed71e8b10d297811c266f96cea4272970a7b816
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, which is a common tactic for phishing and malware distribution. The embedded URL suggests a lure related to medical information, likely to entice users to click. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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/strik?utm_term=torn+ligaments+in+knee+treatment In PDF document text
    • https://cdn-cms.f-static.net/uploads/4456377/normal_5fd63cfd63e1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473415/normal_5fb81aac0e9f7.pdfIn PDF document text
    • https://cdn.sqhk.co/soxemudu/Sihngj1/poughkeepsie_tapes_real_story.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/a5f822c7-bf44-4c94-9316-dd3deaec1fa8/nipup.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/aayirathil_oruvan_full_movies_hd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a362037-a020-4b4e-8bc2-78c22491185d/suralalez.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/92148179980.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1728e55c-0efa-43e2-aced-89bc5bafed24/learn_drawing_apple_pencil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dedf8de-efa8-4b10-a9a4-7b045f720fb4/99222496223.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_off0000ca94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA94 5016 bytes
SHA-256: 83e13577973718c55789ff68640e57d352942edab46cb4ff365f30cee4a088d6
font_01_sfnt_off0000db8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB8F 10320 bytes
SHA-256: 4decc8a4e605183c8e9369289a135a08ac84f631f91cc6cbc9c51526c6042df7

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