Malicious PDF — malware analysis report

Static analysis result for SHA-256 90b55f90e6ffb12a…

MALICIOUS

PDF

68.7 KB Created: 2020-11-17 14:58:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 6b1aaed5c90cccada4c10ef71e1bee90 SHA-1: 18dc9147f39abf3e458dd4d67a9d247e28dc946a SHA-256: 90b55f90e6ffb12a45204ba7e4b3c664daaec6483900068a479faac0b9ab3481
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. An external URI pointing to 'traffnew.ru' was extracted, which is likely used to host a malicious payload or phishing content. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of the malicious URL strongly suggests a phishing or malware distribution attempt.

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=asus+tuf+gaming+fx504 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409992/normal_5f935c4ab7ada.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424662/normal_5f9b217b1f1f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466151/normal_5fac566a9d77a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369502/normal_5f9b74b4755f5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbf2795e-e4a3-45de-9d73-9403c626bc4c/vivitar_mini_digital_camera_software.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e0af2f5-72bc-4f95-8862-86227c2ca0aa/connect_math_answers_college_algebra.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b7686e8-80b2-4f84-a156-8d15084c3ba2/mijizewupuxajilubovuzo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c415275-0b0c-40a6-9180-09cbef6f5c0d/descargar_la_biblia_reina_valera_196.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81173ad2-9cab-47da-81b1-6582ee8fc5f5/nupiwukonaxaralowaviz.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/yellow_belt_lean_six_sigma.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/itasca_mantrap_electric_cooperative.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_off0000ced9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCED9 5368 bytes
SHA-256: c73b6a7851ba0a516ef271db83f31eedeb269a2c0ae2f51103a40eb86a4d03de
font_01_sfnt_off0000e120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE120 10936 bytes
SHA-256: 81164050abe62e2465360c852486b6ce043866209b9c3dc44d52cdab19e9f1bc