Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f51ddfa6c569225…

MALICIOUS

PDF

68.5 KB Created: 2021-03-27 19:55:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eda885346b6dd4020c8dd34b263c2226 SHA-1: 23eea567557adf9fcb45aed7ec4e18bac01ebd31 SHA-256: 1f51ddfa6c569225ecda854e1b0465e9a5ba21d540e049984cb8eb49951732e8
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing attempt. The embedded URL leads to a suspicious domain, likely serving as a lure for users seeking instructions. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to redirect the user to a malicious site, potentially for further exploitation or credential harvesting.

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://dafemum.ru/strik?utm_term=spalding+50+portable+basketball+system+instructions
    • https://static.s123-cdn-static.com/uploads/4366344/normal_5fecf7e5d127a.pdf
    • https://cdn-cms.f-static.net/uploads/4369655/normal_6039d8be31fb1.pdf
    • https://cdn.sqhk.co/kusamika/gd2nMS4/99894363217.pdf
    • http://talekibof.22web.org/81793698034.pdf
    • https://cdn-cms.f-static.net/uploads/4422628/normal_60480a9f53c6f.pdf
    • http://wixosefimaba.scienceontheweb.net/good_vs_well_worksheet_with_answers.pdf
    • http://wunowixumofe.22web.org/zulomopejokod.pdf
    • https://cdn.sqhk.co/mogizufofuj/rSfyhia/pojizowe.pdf
    • https://cdn-cms.f-static.net/uploads/4446382/normal_605d7c4a0fec3.pdf
    • http://pegejoruvufiron.sportsontheweb.net/what_is_the_order_of_the_maximum_ride_books.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ee50f2fc-dafe-4715-bfcc-8137065063ea/jepugujulagidovixovupe.pdf
    • http://zonafikepejese.onlinewebshop.net/ranovoja.pdf
    • https://uploads.strikinglycdn.com/files/775befe4-ec0a-4020-acfd-1a581c9f0d6a/sub_zero_650_door_gasket_replacement.pdf
    • http://vamuxusonepuf.rf.gd/95487701819.pdf
    • https://uploads.strikinglycdn.com/files/08d1b362-9d95-42fe-8348-8ae3a6987d67/manual_de_los_atributos_de_dios_paul_washer_en_espaol.pdf
    • https://a1359116-1358-4cde-afc5-3600b4bb50db.filesusr.com/ugd/3b0c81_d80210b53e924d9687d3253a68a48b96.pdf?index=true
    • http://namepafubi.atwebpages.com/64965581538.pdf
    • https://60659a61-a27b-47ea-8eac-a81775c62269.filesusr.com/ugd/7a7fb1_4de2d5a7787145a2a466b23f072c1d5b.pdf?index=true
    • http://widusop.atwebpages.com/agatha_christie_hercule_poirot_s_christmas.pdf
    • http://fokibuzevurir.rf.gd/cms_calendar_2020_20.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbf6.bin
7f72d1b735fe291b308f2c7d75ce62f56969a1c8d7d4cd4472a2a030e1f7d78a
pdf-font-stream PDF embedded font (sfnt) at offset 0xCBF6 6068 bytes
font_01_sfnt_off0000e08c.bin
3db0335b6d05c7ec83c774db8f640ba65e41e07a5c34fa02eea8ff8ff1accb93
pdf-font-stream PDF embedded font (sfnt) at offset 0xE08C 10548 bytes