Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb670bf0639498a5…

MALICIOUS

PDF

72.0 KB Created: 2021-01-08 04:42:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 0628fb300f2091d25bae61bb64ddea37 SHA-1: 9820d7fdeb93ea167d1b89b921521925b1ff3a2a SHA-256: eb670bf0639498a5f400818b9ae0fb54dce58bf99bc80c85d3e5bb981fef13e7
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into downloading a malicious application. The document body, though heavily obfuscated, contains text related to a 'universal remote apk', reinforcing the phishing lure.

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
  • 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/123?utm_term=sure+universal+remote+apk PDF link annotation
    • https://cdn.sqhk.co/wusoxopejezo/dhhFoUb/goappleonion_adventure_time.pdfIn PDF document text
    • https://cdn.sqhk.co/manuguwe/8jb4L9m/96334093882.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470833/normal_5fbb5afa60fb6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450438/normal_5fd89beae6e7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481403/normal_5fb7276bed877.pdfIn PDF document text
    • https://cdn.sqhk.co/tidelefuzin/xjfghha/29654666267.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475720/normal_5fab3f1f635cf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424997/normal_5feb62621bb20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379370/normal_5fa3eddd8526e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466146/normal_5fc7d1ecc09f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500692/normal_5fc1dd1ae3861.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/022018e3-8446-45f7-b59e-17043268c9f5/suzegubel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21850985-017a-49b1-b9e3-9dc3306e8251/kixosafekefiw.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_off0000ded3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED3 5192 bytes
SHA-256: d627b0fd2e272b2521b13b85d8b8a87a1d2c3d17f4b2731fb6191bfeae5fd30b
font_01_sfnt_off0000f06b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF06B 10344 bytes
SHA-256: 1fdf5514ea20b7d75692865e897b169d954511e6933635e200eefaa674f3d668