Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8329616de64d341…

MALICIOUS

PDF

72.6 KB Created: 2020-11-24 13:12:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 343c44a042a577e010164c5eff546fb3 SHA-1: 7de2f7f4f062f462904d57425030b28b7e5566ee SHA-256: a8329616de64d341f10252e20f878ecc799c6e9f48dab6bf511ca0f05ce8f3a8
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 'traffine.ru'. This indicates the document's primary purpose is to lure the user to a potentially harmful external site. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://traffine.ru/strik?utm_term=destiny+2+chalice+of+opulence+quest+guide In PDF document text
    • https://jowesezowu.weebly.com/uploads/1/3/4/3/134366841/gavefatoxofideza.pdfIn PDF document text
    • https://bapoxaluw.weebly.com/uploads/1/3/4/7/134717037/4117077.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416132/normal_5fb2e37fdbd28.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/tixobipi.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/likadojivivofu/tesda_assessment_form_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/140820e1-6b76-4eea-b542-b303ae0f6c1b/zibuvin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba14d2af-e6d5-438d-a838-78dae5cc1ef9/google_tech_challenge_nyc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25f8ba95-20b2-4ef0-8519-822f9a8ec409/pejuni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a28433d1-46ea-4e2e-b472-f00a3df1e096/pass_compos_exercices_fle.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_off0000bdfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDFB 9200 bytes
SHA-256: f7647623ff203fbf1d8548e7c6b394da3851927349f0242cc5a39ce2b465ddd7
font_01_sfnt_off0000dc82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC82 5680 bytes
SHA-256: c66d07dcd8b83d56dfb9e5d3423213548407eca2b63f9c7974f9891fdcab949d
font_02_sfnt_off0000efe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE2 11028 bytes
SHA-256: d8b33aa7d150e97b43785194223d8c6ff6517a32744e1761122ed5cd0aeb053e