Malicious PDF — malware analysis report

Static analysis result for SHA-256 102196db6dc14da1…

MALICIOUS

PDF

64.3 KB Created: 2020-11-28 18:26:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: c31b7be7b67cc79c15e0e5c682a5ecfa SHA-1: bee32e912d500971508d2df42ec65a4ef5890ac5 SHA-256: 102196db6dc14da1de9d9fcb3fda894cf83efa1a7f8cbc2034392f2e4686cb7c
214 Risk Score

Malware Insights

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

This PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'traffking.ru'. It also exhibits a PDF link farm, with numerous embedded URLs likely used to distribute malicious content or conduct phishing. The ML classifier and ClamAV detection further support its malicious nature. No scripts were extracted, but the embedded URLs and link farm structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=current+portion+of+long+term+debt In PDF document text
    • https://jigaxokere.weebly.com/uploads/1/3/4/6/134622899/9033586.pdfIn PDF document text
    • https://mejawazur.weebly.com/uploads/1/3/4/2/134265830/2074175.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494889/normal_5fae3d3dd438c.pdfIn PDF document text
    • https://febixitojujemo.weebly.com/uploads/1/3/4/4/134402622/8236638.pdfIn PDF document text
    • https://zimiduninu.weebly.com/uploads/1/3/1/6/131637103/duxexezuturoborex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408996/normal_5f9d350151e48.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/dc674ca2-1f03-446a-b65d-b0d37662edff/67369289402.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/76566198564.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b6bff9a-2048-4147-9820-eaa2525a5ba7/46299549835.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19696d89-7832-4f33-a3da-98a77c593ba4/letajigoleni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2207e69c-82af-4956-8a9e-879b066a086b/pozaxizoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c7fe076-5b7b-4eea-9925-077e38efc8fe/59639590230.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_off0000c0fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0FC 5016 bytes
SHA-256: 4b6a431bd97aefd406c3b6df118c6e886b830a0d983a130562b4638926965deb
font_01_sfnt_off0000d1f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1F1 10196 bytes
SHA-256: 672a62aa19dad5931d828ae7901f783962605402a444e7a09d4c03218ea80781

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