Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d7651f0b0bc76b4…

MALICIOUS

PDF

67.3 KB Created: 2020-11-16 20:40:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: deb18e5307295ca78a6548eaab4f57fb SHA-1: 15e047c857bb3efb8da8096a47ce96fe322d26af SHA-256: 7d7651f0b0bc76b4bd333413d263149fd90aa05b96cf8e9118302e285f6e4c50
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files, suggesting a link farm or redirection mechanism. The primary URL, 'https://traffnew.ru/strik?utm_term=how+to+download+feelme+interactive+app+to+laptop', indicates a lure related to downloading an application. ClamAV and ML classifiers strongly indicate maliciousness, likely related to phishing or malware distribution.

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
  • 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.
  • 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://traffnew.ru/strik?utm_term=how+to+download+feelme+interactive+app+to+laptop PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413703/normal_5fad9f7206ba6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365646/normal_5f8b302577a64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401696/normal_5f91489f93225.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370270/normal_5f8c542e1c54f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420028/normal_5fa3125e92449.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404990/normal_5fa2200e3c444.pdfIn PDF document text
    • https://bubixoduxufito.weebly.com/uploads/1/3/1/0/131070588/zivaxad_kejelasefura.pdfIn PDF document text
    • https://bekijarodik.weebly.com/uploads/1/3/4/6/134617997/7237958.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/purufiz/kitaxugotidikeweso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa68c54c-ef54-414f-853a-54d46235a40d/podekuvivedupepebuvamu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd88f739-61e0-456f-ab79-31cc003aa690/mabagalitokasu.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_off0000cada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCADA 5236 bytes
SHA-256: 1fe50f1a83c22dcd393f769e1a62e4ddd60755153766ec6167d072f748abcbeb
font_01_sfnt_off0000dcb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB1 10540 bytes
SHA-256: 33db66413424bf2ab70f49e5076fa037b557db0778b02eaeeb88b2aa357e5152

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