Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ce4099a71737487…

MALICIOUS

PDF

70.2 KB Created: 2021-02-17 13:59:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: e5fa6d80be409d2c0314e48ac6daa009 SHA-1: 1d980dea39cc6247fef0019c3aa2c3cc95be3bd1 SHA-256: 0ce4099a717374878696d13ac33d4232cbc714071e65b734b391fcb2fdd26e01
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 flagged as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or credential harvesting scheme. The document body, though heavily obfuscated, suggests a lure related to legal systems, further supporting a phishing attack pattern.

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://druttle.ru/strik?utm_term=what+is+a+silk+in+the+uk+legal+system PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4367964/normal_6004a0db002ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410211/normal_600ea221ac92a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367313/normal_5fcb53e3afee5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446634/normal_5fd171d3c6789.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490534/normal_5fcd65a824112.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448985/normal_6009cec959349.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484359/normal_5fdee28870723.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417658/normal_6007944fb9e0b.pdfIn PDF document text
    • https://cdn.sqhk.co/wesurewilo/eBhbFyQ/31801159848.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452837/normal_6004bb934c05a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460060/normal_5fc806deda527.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404313/normal_600e692c00c5d.pdfIn PDF document text
    • http://pusaburuku.22web.org/beautiful_nature_wallpaper_images.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375071/normal_60176affd7d0b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369665/normal_5fedf7a4f1006.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://waraposid.rf.gd/64479004410.pdfIn PDF document text
    • http://mulukamuzadesew.epizy.com/87078685762.pdfIn PDF document text
    • http://vimukomexetad.rf.gd/82769961308.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_off0000d75d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD75D 5184 bytes
SHA-256: ebe3f0e95971f084bb40f3a940ac4bcd6abe6b7c72db0be299f70ebf81b56dd4
font_01_sfnt_off0000e8ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8EF 10248 bytes
SHA-256: bc7109ee0c373498f16055d49f53e6caec0566f63a88b4a6ec4706e27b2ad3d3

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