Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d6da88be682d0ff…

MALICIOUS

PDF

68.0 KB Created: 2020-11-25 07:09:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: bcf0e51bb3eee2b5e26e7efc4f3dca46 SHA-1: 711d2c01ec3b2a238b03c6432f9768d9d036a6c7 SHA-256: 8d6da88be682d0ff15a2de6463236a16310b6753cfbebc5733672b161363e79c
154 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=funblocked+unblocked+games'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the redirector suggests an attempt to lure the user to a malicious site, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=funblocked+unblocked+games In PDF document text
    • https://wiworixoso.weebly.com/uploads/1/3/4/3/134321663/dizaguxogot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368760/normal_5f8ce793a7fb9.pdfIn PDF document text
    • https://gejatovuri.weebly.com/uploads/1/3/1/4/131406669/7af12562e.pdfIn PDF document text
    • https://mepopuwiv.weebly.com/uploads/1/3/4/4/134499337/ruginafam_tiwejoxotif_seguwegakonozis.pdfIn PDF document text
    • https://woxukobu.weebly.com/uploads/1/3/4/3/134392577/5e24431839.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/7d7b6617ab8.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/2eca70ef-3c66-496a-955b-cef1ce5eb14d/musowumafudemu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/527b4168-9c6c-4401-a0fe-5732bb52b78e/67264121962.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5f0b2e4-35ca-43c8-b620-e0c6b462e15c/welixufavos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6311bcaa-f301-4a54-a2a8-a4da06eb45de/streaming_freebox_mini_4k.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0454ca7d-a71e-41d3-b064-1064779189a2/publix_oasis_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/060752d0-5de1-4d19-bfe3-4e54018b7e03/68316083353.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce60a51b-fb78-4669-ac42-11c98a33d5fa/vufobetuko.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_off0000cc97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC97 5320 bytes
SHA-256: 81d8e895b0968cb552bb41d4fcfc8fb217ad85f68e3c9fb18f43bf50654ef3b3
font_01_sfnt_off0000dea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA5 10776 bytes
SHA-256: 049bdde473252d342968fd1ede27f7f27d02f82256026d247e1cde166cc6e53e

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