Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8c461f618774aa2…

MALICIOUS

PDF

77.7 KB Created: 2020-12-27 02:21:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e0528095ce819c7603349aca3873b6f6 SHA-1: 59c2a36ba18f8a3357205323cfaf7cb195a2f13b SHA-256: e8c461f618774aa292fb7b30246b1027f5fee93dd36ba28cbf8b1e3f385f5c82
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, specifically identified as a phishing trojan. It contains an embedded URL that leads to a suspicious domain, likely intended to host a phishing page or download further malware. The document body, though heavily obfuscated, contains keywords related to the embedded URL, suggesting a 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://trafffi.ru/strik?utm_term=bluestone+pavers+price+melbourne
    • https://static.s123-cdn-static.com/uploads/4477651/normal_5fca780e6bf61.pdf
    • https://cdn-cms.f-static.net/uploads/4491175/normal_5fb45b8adbf19.pdf
    • https://cdn-cms.f-static.net/uploads/4379601/normal_5f8e3c920c1a6.pdf
    • https://cdn-cms.f-static.net/uploads/4464523/normal_5fa65f4c9d974.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/pexodugosa/guzejivixu.pdf
    • https://s3.amazonaws.com/voropa/pneumonia_bacteriana_pediatria.pdf
    • https://s3.amazonaws.com/jazamerijekufol/novufumex.pdf
    • https://uploads.strikinglycdn.com/files/0501cdca-6549-44b3-bb80-c582d5e8647b/ramexitutidedogajosasim.pdf
    • https://s3.amazonaws.com/fizufapu/manual_handling_risk_assessment_form_template.pdf
    • https://uploads.strikinglycdn.com/files/356d6544-7d45-42b5-9a66-6cde5aa1f8bc/beresekifuxitebiz.pdf
    • https://s3.amazonaws.com/wixanarer/39908996420.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e448.bin
94f5e8062771afcb0087c2b5c46de88018880231a9da5412ec56f3438276d3c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE448 5212 bytes
font_01_sfnt_off0000f5e7.bin
a33b495b7ec24e70a5823687992c2888c7537cba5665d2679a16da0c17db0191		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E7 11624 bytes
font_02_sfnt_off00011bdb.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11BDB 4324 bytes

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