Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f243c626b527e78…

MALICIOUS

PDF

81.5 KB Created: 2021-02-14 13:26:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 90385493049f0250e21e361cc44d75f3 SHA-1: e38143b773dcf6854e6eb04bde762c9ba50e32a9 SHA-256: 6f243c626b527e7819243e2ec942c89115041feaad946d9eb65918ce7cd9992e
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a specific detection name indicating it's a phishing trojan. It contains an embedded external URI pointing to a suspicious domain, which is a common tactic for phishing lures. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to malicious content.

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/123?utm_term=the+devil%2527s+punchbowl+california PDF link annotation
    • http://wutugupim.iblogger.org/plural_form_of_state_attorney_general.pdfIn PDF document text
    • https://cdn.sqhk.co/novigigexuxo/gt9vDgh/islands_of_adventure_harry_potter_new_ride.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422161/normal_601a29f18a442.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388405/normal_5fe22749d3678.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421199/normal_5fee714c7a084.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445104/normal_60064d3fd5a01.pdfIn PDF document text
    • https://cdn.sqhk.co/benibavagoge/MHRjdhd/68488412520.pdfIn PDF document text
    • https://cdn.sqhk.co/dukosisevu/aQjquFr/heart_beating_fast_at_night_pregnant.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/sidafulugum.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/bikini_body_guide_food_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/77380336837.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/architecture_101_subtitle_indonesia.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/bowling_alley_business_plan_template.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_off0000ffcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCB 5516 bytes
SHA-256: b9b49208c1bdf60e1ceaa65039253f3419d1b1bd97df280ce043a72c91aa3803
font_01_sfnt_off000112a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112A4 11236 bytes
SHA-256: 0609bd71c4b3cf6ba0c12c23cb6cf8ad2befc1270d6afa6d9a391aedbd3d1254