Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f11624e6a779842…

MALICIOUS

PDF

81.6 KB Created: 2021-01-12 20:41:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 650d9fc003a5e3c7a1b79378c1e221c8 SHA-1: d6565144a801828c0c218a6bf88259f3917b9e19 SHA-256: 8f11624e6a77984275fec3befd95dfd2b8628a05fad284522226f0d5c4d6c0e4
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely for a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to trick the user into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafficel.ru/123?utm_term=magic+arena+android+beta PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4428329/normal_5fba736c0f708.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383586/normal_5fcedf8043b28.pdfIn PDF document text
    • https://site-1174657.mozfiles.com/files/1174657/super_stick_boy.pdfIn PDF document text
    • https://site-1190334.mozfiles.com/files/1190334/santa_crime_rope_hero_vegas_crime_simulator.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378856/normal_5fca6755ab0d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463306/normal_5fae42e952283.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/simujix/report_power_outage_toms_river_nj.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/chloroform_dna_extraction_protocol.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/wujerubenofuk.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/middle_grades_science_projects.pdfIn PDF document text
    • https://s3.amazonaws.com/ziwuvijevo/19024032880.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/calendar_dashboard_template_bootstrap.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_off0001033a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1033A 5044 bytes
SHA-256: d5241a853c8ffb033e4ab4f00387d74ae193433498eb3aee76c6f9e44932c487
font_01_sfnt_off00011478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11478 10968 bytes
SHA-256: d16df73e56439956f02757e549950fc81fac5950f1ac2d0bd10633d1beaea7ea

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