Malicious PDF — malware analysis report

Static analysis result for SHA-256 925de756fb3e8332…

MALICIOUS

PDF

83.1 KB Created: 2020-12-29 19:49:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 0914c370662339ab5487cbbac69b2ccb SHA-1: c2480bff8ee3629060736e046d238b1c2981b6b9 SHA-256: 925de756fb3e83323a489777d4beb8b080ca439b998fa76bc9eb7254a6b87037
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically identified as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing site. The document body appears to be obfuscated or corrupted, but the presence of the external URI is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=centrist+party+united+states PDF link annotation
    • https://cdn.sqhk.co/kozuvurop/i7qgjpk/nearby_friends_facebook_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384836/normal_5f8c53e3d0fc1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393499/normal_5fda002123d16.pdfIn PDF document text
    • https://cdn.sqhk.co/godivago/bbgdgg5/11502115733.pdfIn PDF document text
    • https://cdn.sqhk.co/zolokike/higjijl/42359434146.pdfIn PDF document text
    • https://cdn.sqhk.co/podizapexiv/dtjcehe/3017827706.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/ef2f72b4-a234-42b4-bf58-03b2f25cc115/jejijiwotavutimabimiwas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e7346dc-741d-4ccf-9aa8-5055f5650259/que_es_skydrive_wikipedia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a407119d-f28a-45a0-83a3-481cf1ef5381/19067792071.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/527b84a3-38e8-405e-9f11-3158bbe46cae/foxego.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef4c5f4e-56df-4b34-b4e0-611b7bbc4b29/xumufip.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_off00010ac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC1 4928 bytes
SHA-256: a091e0ed455ed97f25a463daea3998f09e8d6fdd24751adc670077f814b544f3
font_01_sfnt_off00011b95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B95 10460 bytes
SHA-256: fd446975dc38460cf84ec5ac174f1ff3e7c99dab6557d74fff681b74a8bda8fa