Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bde4e7f4aadc16e…

MALICIOUS

PDF

69.6 KB Created: 2020-12-25 23:15:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca31ddb70ba42e2b9888390fa5c49ef3 SHA-1: d8fa84cdd4185ffcce2974b700ef182f4f18adf7 SHA-256: 1bde4e7f4aadc16e58bc3dfd8c8d99a05f4db8906e5487aa44947d9e50822ae3
96 Risk Score

Malware Insights

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

The file is a PDF with a high ML classifier score and ClamAV detection, indicating malicious intent. It contains an embedded URL pointing to 'traffset.ru', which is likely used to redirect the user to a phishing site or download further malicious content. The PDF structure and embedded content suggest it's designed to appear as a legitimate document to trick the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/aws?utm_term=adobe+illustrator+isometric+grid
    • https://cdn-cms.f-static.net/uploads/4366637/normal_5f8f1f85c5fec.pdf
    • https://cdn-cms.f-static.net/uploads/4418746/normal_5fbc0905c5ee2.pdf
    • https://cdn-cms.f-static.net/uploads/4446937/normal_5fad32f675d09.pdf
    • https://cdn-cms.f-static.net/uploads/4366044/normal_5fac0d97037cb.pdf
    • https://cdn-cms.f-static.net/uploads/4417814/normal_5fa312eaf15d6.pdf
    • https://zubefexer.weebly.com/uploads/1/3/1/6/131606337/sexot.pdf
    • https://cdn-cms.f-static.net/uploads/4392220/normal_5fd18ca6f2dae.pdf
    • https://cdn-cms.f-static.net/uploads/4388626/normal_5f91d34423c12.pdf
    • https://static.s123-cdn-static.com/uploads/4417037/normal_5fcf93b08886b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wizidimawag/swg_bestine_election.pdf
    • https://s3.amazonaws.com/tibitexil/74551018043.pdf
    • https://s3.amazonaws.com/punagilelabon/black_and_decker_spacemaker_toaster_oven_canada.pdf
    • https://s3.amazonaws.com/xaliwalufoguni/a_strange_day_in_july_horror_stories.pdf
    • https://s3.amazonaws.com/tobaziw/vajiv.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0ae.bin
20b2b1f66bde5528f39fa0ee79df73d548a75ada78be9d69cbd2b3e98f1c87a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0AE 5388 bytes
font_01_sfnt_off0000e2e3.bin
f23b9e055b99685282ff69c53320a2809c03f1768a19ee70c34e20fa7c43b883		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E3 11492 bytes

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