Malicious PDF — malware analysis report

Static analysis result for SHA-256 461de173febbc3ac…

MALICIOUS

PDF

81.2 KB Created: 2021-01-03 14:25:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: b64704e7a058d11f32f464b17d2add2b SHA-1: bf1d15922a678a5c04743bcf3ca292af0945086e SHA-256: 461de173febbc3ac23458781620b97d2dcdbdf0abcc0f1fc444c91c87e56fd24
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a critical heuristic firing for ClamAV detection. An external URI pointing to 'trafffi.ru' was extracted, suggesting a phishing or malware distribution attempt. Although no scripts were directly extracted, the PDF structure and the presence of an external URL indicate a likely attempt to redirect the user to 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://trafffi.ru/123?utm_term=let+me+be+a+woman+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4485443/normal_5fc85f39ebf97.pdfIn PDF document text
    • https://cdn.sqhk.co/xubenijevewe/gd6ge0Q/learnzillion_guidebooks_grade_5.pdfIn PDF document text
    • https://cdn.sqhk.co/tubafejog/9IEFhh3/jutafakuzudab.pdfIn PDF document text
    • https://cdn.sqhk.co/nedupugifuka/jaMidgj/ba_gatwick_strike_dates.pdfIn PDF document text
    • https://cdn.sqhk.co/wefekoferu/UJijhdg/60549651333.pdfIn PDF document text
    • https://cdn.sqhk.co/luwivimexu/aDhfifz/slices_and_ices_ronkonkoma_menu.pdfIn PDF document text
    • https://cdn.sqhk.co/xusawikorut/NBigcYO/76811740443.pdfIn PDF document text
    • https://cdn.sqhk.co/kurotevu/6qoJKib/99608499570.pdfIn PDF document text
    • https://cdn.sqhk.co/mozejipakas/ihGgeRj/ruwovivotanabedoxaberu.pdfIn PDF document text
    • https://cdn.sqhk.co/sakiforivona/IZjbje2/citytopia_mod_apk_2._8._5.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/01469c85-5beb-47af-8ed2-8142c79ff986/rarawa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecd2db88-4cc6-4c04-821e-ca9dd9ebf60e/wazadelogidomapefikoma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f01ec5b9-e595-43fc-9d7e-e3adb15b931f/45579988492.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1313a163-e2fa-41cd-813c-1ed761cf956e/opti_farms_keto_pills.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_off00010147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10147 5052 bytes
SHA-256: fc1e3b4d1d78141a5ff2f282019f1fac1c333339fc4e50f319bf1a9523555d84
font_01_sfnt_off0001127b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1127B 10956 bytes
SHA-256: ea61120ed04b1dfc232f891ba7ca0536108c6b7ab2659f19e0d6e319c1922ee3