Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d4f599cc92651ea…

MALICIOUS

PDF

71.5 KB Created: 2020-12-29 17:00:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d0da281848e3fed3d65289d6f693f054 SHA-1: bb3a9dc023e5481a33988bc3072e4a744523b264 SHA-256: 8d4f599cc92651ea7e1318af71aec2a62444fcef3bb6c6ee4a5a34cab8b3582e
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URI pointing to a suspicious domain, identified by ClamAV as 'Pdf.Phishing.Trojan'. The ML classifier also flagged it with high confidence. While no scripts were explicitly extracted, the presence of external URIs and the nature of the detection suggest it's designed to redirect users to malicious content, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffe.ru/123?utm_term=d%2526d+5e+one+page+dungeons PDF link annotation
    • https://cdn.sqhk.co/pofevadamem/eiaFZha/62129096240.pdfIn PDF document text
    • https://cdn.sqhk.co/gikunixa/iHjHjik/42195258067.pdfIn PDF document text
    • https://cdn.sqhk.co/kuruwoke/gjiipjg/vogejususozorar.pdfIn PDF document text
    • https://cdn.sqhk.co/kitaparek/45SWlii/grandma_nursery_parents.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449616/normal_5fd3cc9baaaa6.pdfIn PDF document text
    • https://cdn.sqhk.co/wotutovebo/9hhwRhg/luxedumezela.pdfIn PDF document text
    • https://cdn.sqhk.co/gagufatemo/jahit99/tripp_trapp_high_chair_baby_seat.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/0b8be912-7bc3-49cc-b338-5a13bf070aa5/fairouz_mp3_telecharger.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24bd0749-36f2-4595-8201-1881cc4152e7/algebra_rules_of_exponents_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/470eabd3-f121-4a45-b33d-e816627f9fc8/sejulabe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c1d9ad8-109f-42b6-a808-e547b19026cf/australian_animals_colouring_pages_printable.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_off0000df51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF51 4156 bytes
SHA-256: 7b9a78bc71d00e4bcff8473d51fc82c270a18144a13d22e5cfd906eda86eaada
font_01_sfnt_off0000ed7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED7F 10604 bytes
SHA-256: 1e487538c97b4d3481eef8ab03fceed7c7208870c5adae51ce8d6b825f37360b