Malicious PDF — malware analysis report

Static analysis result for SHA-256 90e9aba1bda5e313…

MALICIOUS

PDF

85.9 KB Created: 2020-12-17 07:59:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9276d7562ebe6464922a9c5c2ece83d9 SHA-1: b2a19c1a8fe7545a9eeedc7812b00cb935762e4b SHA-256: 90e9aba1bda5e3133cdf90a2a0daf0c3fde9f927a04c99c6277c3e8e18b5a72e
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'traffking.ru', which is suspicious and likely used to deliver a payload or conduct phishing. The document body, though heavily obfuscated, suggests a lure related to a crossword puzzle.

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://traffking.ru/strik?utm_term=blank+crossword+puzzle+grid+21x21
    • https://static.s123-cdn-static.com/uploads/4485310/normal_5fcc392d01342.pdf
    • https://cdn-cms.f-static.net/uploads/4413017/normal_5fb27929e26f1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc380a5bd14ff0dd2ad0ae2/t/5fc88b92094cf7617dc3b1ae/1606978451113/18680681189.pdf
    • https://s3.amazonaws.com/pibabopuduj/class_vice_president_speech_ideas.pdf
    • https://uploads.strikinglycdn.com/files/e71d5cb0-f2cf-44ce-b6cf-a09f6669581e/temagelatineriku.pdf
    • https://uploads.strikinglycdn.com/files/df48c5b5-dc90-4c00-8894-3cb8186a3545/boy_scout_space_exploration_merit_badge.pdf
    • https://uploads.strikinglycdn.com/files/dc192cb0-fb55-42fa-9d98-f484fafc01b4/combustion_chamber_design_in_gas_turbine.pdf
    • https://s3.amazonaws.com/tubukeganuji/websites_to_hollywood_movies_in_hd.pdf
    • https://s3.amazonaws.com/tigovatolis/8044154584.pdf
    • https://uploads.strikinglycdn.com/files/cc533676-2037-41b7-b136-2c592de4d4c1/5th_edition_players_handbook_fr.pdf
    • https://s3.amazonaws.com/zamemigojat/45193173826.pdf
    • https://uploads.strikinglycdn.com/files/10e2795e-486f-4c98-9419-4386d9b22d5b/why_should_we_recycle_book.pdf
    • https://static1.squarespace.com/static/5fc56aec88c99b6d37c5a745/t/5fc7f5ebed54591d0cbe88ee/1606940140976/how_to_download_bet_app_on_firestick.pdf
    • https://uploads.strikinglycdn.com/files/257f5ea3-4d2b-4cc3-985e-d37dca451844/58001183958.pdf
    • https://uploads.strikinglycdn.com/files/190f554a-a2c8-4c65-af3c-9276a86c6392/3516348559.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_off00011161.bin
ff9626f553f85e635534a77273a80105ac146bcbf824c1cd0829edf2bf86ece8
pdf-font-stream PDF embedded font (sfnt) at offset 0x11161 5748 bytes
font_01_sfnt_off0001252e.bin
821d45f9b4f95dc8ddd8fdb9fdcf565162286e20b300927832b2fb64c238268a
pdf-font-stream PDF embedded font (sfnt) at offset 0x1252E 10880 bytes