Malicious PDF — malware analysis report

Static analysis result for SHA-256 408b7da9b5b9cdae…

MALICIOUS

PDF

68.9 KB Created: 2020-11-11 17:42:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 74d31416049d9d67d566e3f42a853ca4 SHA-1: f9a2d0f878fbb057d7c9cc30e1bc0fcbf18d8ac6 SHA-256: 408b7da9b5b9cdaebeded3b120368406d420811621d8c900aeed9d12ad09c5f3
96 Risk Score

Malware Insights

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

The sample is a PDF document identified as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to 'traffset.ru', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to be related to 'The complete guide to anatomy for artists', likely a lure 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://traffset.ru/strik?utm_term=the+complete+guide+to+anatomy+for+artists PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384160/normal_5f9264fd335d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381344/normal_5f9cfae48c0ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366317/normal_5f8ab09cc31c1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/84c78806-2e66-4284-912a-fbe1b9dcb1e5/zavimurugijatinabuzime.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/valosazaxulezanu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c231d3b-7e9d-480c-86a5-40a968c42643/how_to_build_a_dance_floor_on_concrete.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5d33d0a-2e8c-4b2a-8b9a-b9f120deb684/orland_park_theater.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cf030fb-355a-451a-93b9-d5c3d9159908/jurizudaliwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/848d059e-3f32-4b3c-8128-1b0bee60808b/rulagekoviz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8091128f-48a2-4698-bd67-0ab7352fa8ba/xexivovozamegakoz.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/10416854760.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC449 5500 bytes
SHA-256: 2be6e34f0971cc374e01c0c2608a4597a3fc778d2b669c2430bbdd78a5f4232c
font_01_sfnt_off0000d6dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DC 9944 bytes
SHA-256: 3e6196ea6f50068e49899ffa4c0773a94166c2ce8c93e8d36f247d0465ec4aa0
font_02_sfnt_off0000f8e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E4 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3