Malicious PDF — malware analysis report

Static analysis result for SHA-256 3149087c854074a1…

MALICIOUS

PDF

70.9 KB Created: 2020-11-24 00:11:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 37d830535a0e4af8c898fa5629287b6b SHA-1: a7eeff00888ab7e44d2773d0fe4f6e112879924e SHA-256: 3149087c854074a120ae1f6f09c23d7639e373feac724ae631b13c81f21a1772
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/strik?utm_term=dokdo+game+guide'. This indicates the document's primary purpose is to redirect users to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious, supporting the conclusion that it is designed for malicious purposes, likely phishing or malware delivery.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=dokdo+game+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372101/normal_5f88c2afc9a62.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/vuzufexarevima/female_yorkie_pup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4193a5ec-508a-4176-8575-84456052021f/15191939314.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e32e5dc-dcac-47c5-80c6-aa494362e9ae/41102295286.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/free_sheet_music_for_guitar_chords.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63018f3d-e701-4ab1-87db-7942d6ea6082/mebuduburugizidim.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/53752805384.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d8dd146-42a3-4b7d-b609-6eb805dd75f7/jebazawoxejadol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/595335d8-9369-4943-8e10-741a9bc13d8e/xadokiwekavov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f4099dd-810d-4c1c-b2e6-d8397eb6b3c4/17083817671.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6186a10-f229-4595-a5fe-7c03da32e75b/12606889512.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9aef03d-2d97-425f-bcc8-c808aedcc296/64374498449.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/strand_theatre_clinton.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_off0000d258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD258 4900 bytes
SHA-256: cbe4dde48d3250779d108d8d89eb48059035055cb0169fead782ac90f2e26b30
font_01_sfnt_off0000e2fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FB 1852 bytes
SHA-256: 64ef973f4c7e15ffe45038125c326a305a1ac393e57153fbaba1c4baf0375dec
font_02_sfnt_off0000ebd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD2 10032 bytes
SHA-256: 19c91447ed9c29550fae377a5f6752ff21a5e5f5dcdeee3dbee217eb5626bb98

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