Malicious PDF — malware analysis report

Static analysis result for SHA-256 c31523489cca949f…

MALICIOUS

PDF

77.9 KB Created: 2020-11-13 02:42:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 389c6c55e2032cb25fce66be9c872f81 SHA-1: 1a1837d917b29ff63d935336bbc1082a69dace8a SHA-256: c31523489cca949f704f415b56daae77d3c5e3b4dc67da3933206a80c69241ae
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a phishing site. ClamAV and ML classifiers have identified this file as malicious, specifically a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to "Wing Chun forms step by step pdf", likely to entice users to click the malicious link.

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://traffnew.ru/strik?utm_term=wing+chun+forms+step+by+step+pdf
    • https://cdn-cms.f-static.net/uploads/4413980/normal_5fa500c706afb.pdf
    • https://cdn-cms.f-static.net/uploads/4366965/normal_5f88ac853d1a4.pdf
    • https://cdn-cms.f-static.net/uploads/4450141/normal_5fa957b5051f0.pdf
    • https://cdn-cms.f-static.net/uploads/4481513/normal_5fa795002da07.pdf
    • https://cdn-cms.f-static.net/uploads/4367303/normal_5f8aa4b3df32c.pdf
    • https://cdn-cms.f-static.net/uploads/4370284/normal_5f92f3016f15e.pdf
    • https://cdn-cms.f-static.net/uploads/4453338/normal_5fa4826ee03ef.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/bakoloj/darien_lake_performing_arts_center_parking.pdf
    • https://s3.amazonaws.com/wogikokuzotaxa/51472407746.pdf
    • https://s3.amazonaws.com/wanasuvedigo/oconee_county_arrest_records_sc.pdf
    • https://uploads.strikinglycdn.com/files/d9e55edf-ee03-4280-b8db-5ad82a1a64ef/10143045250.pdf
    • https://s3.amazonaws.com/fukepez/87568960346.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_off0000e5ee.bin
655e7d4573056bf717e7b10a1c7832f27bbc18f27fc2c921ed72e6a566ee40b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5EE 5464 bytes
font_01_sfnt_off0000f862.bin
0930e2fd59488545aaff36a407efb8fe72781aa8cb3a8a27dbd4ca012fa41c6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF862 10444 bytes
font_02_sfnt_off00011c51.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C51 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.