Malicious PDF — malware analysis report

Static analysis result for SHA-256 43f37932521b2b0d…

MALICIOUS

PDF

72.9 KB Created: 2021-03-22 20:37:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9728ac51707793d57a1e492820ac270 SHA-1: 7694eb803253f27e83b94b981f91067acbf33845 SHA-256: 43f37932521b2b0d3cb08cdc874624d0600c1d2e362b4115391d7af9af974aa8
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 website with a query string suggesting a lure related to digital art conversion. ClamAV detection and ML classification strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URI are indicative of a social engineering attack.

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://druttle.ru/strik?utm_term=how+to+convert+drawing+to+digital+art
    • http://limevekobo.iblogger.org/bajexokotizurakixugaji.pdf
    • https://cdn.sqhk.co/remowiwa/ijggj6T/police_officer_salary.pdf
    • http://satibudax.22web.org/bitodinetilarewid.pdf
    • https://cdn.sqhk.co/jefigujaxev/iihbhep/skyward_login_ccisd.pdf
    • https://cdn.sqhk.co/videgogaf/ijg2jdL/line_segment_geometry_definition.pdf
    • https://static.s123-cdn-static.com/uploads/4503525/normal_5ff461cd1d535.pdf
    • https://static.s123-cdn-static.com/uploads/4417413/normal_5ff9a7c36eb24.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/bc64c494-b7f9-48fc-9272-e5006dbc42df/evh_5150_iii_50_watt_review.pdf
    • https://uploads.strikinglycdn.com/files/c3b6b939-aa6c-47bc-b98c-3b8084329b06/nafadoragugewijefa.pdf
    • https://uploads.strikinglycdn.com/files/371380c9-e77f-45ba-9e7d-866a07afb15b/brother_p-touch_pt-1290_manual.pdf
    • https://uploads.strikinglycdn.com/files/ecec50d3-2ab7-4793-b2b3-8195f6b6c974/momategekebumupa.pdf
    • http://nelarigutixus.rf.gd/sample_letter_of_agreement_between_two_parties.pdf
    • https://uploads.strikinglycdn.com/files/991b807a-c007-4074-b305-96cd8d7a74cf/java_mvc_interview_questions_for_5_years_experience.pdf
    • https://uploads.strikinglycdn.com/files/804d16c9-c677-46ed-8b37-ae9b5ca52312/yamaha_rx-v363_specs.pdf
    • https://uploads.strikinglycdn.com/files/48e3fb0b-6fae-4b79-9a18-e701b380146f/nexus_mods_witcher_2_saves.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_off0000e303.bin
98e3ff4318f12e61ecaefd91f3e87275f99fc3885dc3e28b1995a6c12bf57c76
pdf-font-stream PDF embedded font (sfnt) at offset 0xE303 5044 bytes
font_01_sfnt_off0000f450.bin
d5426f6f8343f9e7bdfed6a8839f701ff89560a03f681a19a588a7067810db40
pdf-font-stream PDF embedded font (sfnt) at offset 0xF450 10112 bytes