Malicious PDF — malware analysis report

Static analysis result for SHA-256 588a07c9533b837d…

MALICIOUS

PDF

76.9 KB Created: 2020-12-30 20:12:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: fe9d8e341789af004a3c45db91f2e8bf SHA-1: 329bfa4f32572036cf1623ba4dca4bc6a88aa7b6 SHA-256: 588a07c9533b837d8764505dc6ca1c0c965d2e5f973c545b93724534b8a35dde
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a link to a known malicious redirector, traffmen.ru, which is a strong indicator of phishing or malware distribution. The document body, though heavily obfuscated, contains text related to 'UFC score predictions', suggesting a lure to entice users to click the malicious link. The ML classifier and ClamAV detection further support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffmen.ru/strik?utm_term=ufc+score+predictions In PDF document text
    • https://cdn-cms.f-static.net/uploads/4486053/normal_5fa8be2947d1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408881/normal_5f93723c1ffda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452853/normal_5fa3a06abab01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416316/normal_5f954a2d6ef7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413369/normal_5fb2c82a3dafe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470207/normal_5fdaf0a5c6efd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366035/normal_5f870db5908d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488346/normal_5fae208736492.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369768/normal_5fd0785be2393.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502870/normal_5fc8fd68d6694.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/moduxanakuri/20982358029.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/dslr_camera_pics.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/improving_self_confidence.pdfIn PDF document text
    • https://s3.amazonaws.com/bolovopizonuki/57466410211.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_off0000e5a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A0 4688 bytes
SHA-256: 82f5ad97887dc878f0092b281ab4baf05958842de0589b97379eb470d2923441
font_01_sfnt_off0000f597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF597 10368 bytes
SHA-256: 865f09f15699fd22bf7013f4b90696d0ae4e9cc25bbac0c075e6f1b5352c9787
font_02_sfnt_off000118f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118F1 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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