Malicious PDF — malware analysis report

Static analysis result for SHA-256 78561f5f80903f76…

MALICIOUS

PDF

64.4 KB Created: 2021-01-11 20:57:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 36d1bb909bf772bb069acc4c91ed24a7 SHA-1: 7a8f18d45a3823ff12cc546b61755100e8f83807 SHA-256: 78561f5f80903f76027d6ccf329cf14b303d71158566e57ca9cc41f9aa82d73c
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, likely intended for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to trick the user into navigating to a malicious site, potentially as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffi.ru/123?utm_term=under+armour+thermos+replacement+lid PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4421474/normal_5ff461b465204.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370317/normal_5fcfecf39de8c.pdfIn PDF document text
    • https://cdn.sqhk.co/mowogibewu/jhhejcy/daily_cleaning_checklist_for_daycare.pdfIn PDF document text
    • https://jarofuzaduse.weebly.com/uploads/1/3/4/5/134502270/wagewejuvidoz_vakutarisogegix_kijowekan_zeratijegoj.pdfIn PDF document text
    • https://cdn.sqhk.co/rivogigaweb/2jhjfWh/real_drift_racing_3_mod_apk.pdfIn PDF document text
    • https://vikumeniwexawud.weebly.com/uploads/1/3/0/9/130969440/8324032.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/nuselufuzo/transformation_of_rice_mediated_by_agrobacterium_tumefaciens.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/video_editor_with_song_app.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/37352363731.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/friendship_gana_songs_masstamilan.pdfIn PDF document text
    • https://s3.amazonaws.com/xabalaru/tamilrockers_hd_movies_free_telugu.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_off0000bf2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF2B 5304 bytes
SHA-256: 4a2ba9e9813c15c9397bf760a1e00d6ce61821a948eb60b220543d8b2ba3c314
font_01_sfnt_off0000d10c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD10C 10388 bytes
SHA-256: f124bbdfe5b01e0698897ac4423ded19c1417738de757eaa412af5afaff46cb2

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