Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ec78328c8065990…

MALICIOUS

PDF

61.9 KB Created: 2020-11-18 05:23:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 494ca385608a0fbae9a43dc8da6022bb SHA-1: 1f003eb98c51ca631c9e836fb27c30614c070980 SHA-256: 4ec78328c80659906b75bb3ab9173a00f8621a7a5c6d75c1c4567957eb6a67dd
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The embedded URL `https://trafffe.ru/strik?utm_term=jeep+liberty+repair+manual` is the primary indicator of malicious intent, likely leading to a phishing page or malware download. No scripts were extracted, but the PDF structure and URL suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffe.ru/strik?utm_term=jeep+liberty+repair+manual PDF link annotation
    • https://gomemetunugup.weebly.com/uploads/1/3/2/7/132712315/futabudota.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365660/normal_5f87149743c4c.pdfIn PDF document text
    • https://xojujafu.weebly.com/uploads/1/3/4/6/134633902/9881166.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/lowiwoled_kavanivu_vudejemonig.pdfIn PDF document text
    • https://dosedupuwosiwoz.weebly.com/uploads/1/3/0/7/130776272/sujematovo.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/d37071df-135d-4773-8b43-f274d4acc42c/analytic_reporting_tools.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/tomowalekodepuwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/594c6c00-9f4a-4da9-aef6-6a70894362cd/meruvixutuvawuvudo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b58f4b84-d320-4855-87ca-0a1ed922ef3e/free_v_buck_generator_2020.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_off0000b76f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB76F 5016 bytes
SHA-256: ac87748baa26e900184a7d4a498bd52efae7dc934de4be67e6b55f9e450eaf26
font_01_sfnt_off0000c86f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC86F 10288 bytes
SHA-256: 121613a6e08ab77af73d12707fecbce71493adfb0d9e5c26f639d1ad7f9aa69b

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