Malicious PDF — malware analysis report

Static analysis result for SHA-256 a21f5103885d6eaf…

MALICIOUS

PDF

70.6 KB Created: 2020-12-23 00:45:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: adef652730248fdf628681574a163c2a SHA-1: 9ced0119762ea5f56c99ea50d0cec5bc85fbb248 SHA-256: a21f5103885d6eaf35c746496d3fd07b96659cbd8e87649a5377c84c0ef382d5
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, traffking.ru, which is disguised with a seemingly benign search query. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URL suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://traffking.ru/strik?utm_term=dragon+ball+legends+tier+list+2020+october In PDF document text
    • https://cdn-cms.f-static.net/uploads/4378831/normal_5fd9f8039bf3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448330/normal_5fd62ad11b935.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373770/normal_5fdc6005edf28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366034/normal_5fb610aa66064.pdfIn PDF document text
    • https://zilasemewoxuj.weebly.com/uploads/1/3/4/3/134318224/wiwisizote.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc2d321f9866f3fd2e0c591/t/5fc90a0d58026e01688a8e77/1607010831820/11952564859.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce0b389c32423a38e5892d/t/5fd0bf3b75f5e5048578d3b1/1607515964260/fire_and_water_restoration_contractors_insurance.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/49233307836.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b5b6264-0208-4d5a-8335-c01e15472ebd/protective_relaying_principles_and_applications.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdeea79ee0f32b8718844c/1606282920512/i_love_the_mountains_cocomelon.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_off0000d62d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD62D 5520 bytes
SHA-256: d2154cd9faf707eccefc121e32a008e6456c85f9cdea262f2f9dfe1f7ba99998
font_01_sfnt_off0000e900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE900 10608 bytes
SHA-256: 907c48ba4cf7f61f8cabf2a0a2ae00855a98fefa09c96a70176839c8dda94aa8

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