Malicious PDF — malware analysis report

Static analysis result for SHA-256 51fbba2e501e0546…

MALICIOUS

PDF

88.5 KB Created: 2021-03-01 11:46:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: c3430ee3a6762ce3aae9b0e465af826a SHA-1: 23ebb647910f8cdd45f53c3afdc21623b8fd0d30 SHA-256: 51fbba2e501e0546a1470e86bd91a5acc3a842b4b0c873b96dbf2c674fb14eea
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely 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 it's designed to exploit users by directing them to malicious content.

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://nipisod.ru/strik?utm_term=making+movies+sidney+lumet+review PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4425913/normal_5feb294acfbfc.pdfIn PDF document text
    • https://cdn.sqhk.co/dijexovesaf/flOhfzI/masha_e_urso_festa_infantil_simples.pdfIn PDF document text
    • https://cdn.sqhk.co/rivotoxupow/ijiEhi6/candy_crush_soda_saga_level_1882.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377113/normal_5fc6df0c313e8.pdfIn PDF document text
    • https://cdn.sqhk.co/vunelebu/Hgchegc/zombie_survival_game.pdfIn PDF document text
    • http://ing-cliente.com/zombie_district_apk_modkuhfq.pdfIn PDF document text
    • https://cdn.sqhk.co/fiporalisu/wieCrPF/dajabaxow.pdfIn PDF document text
    • http://healsmall.space/mp3_player_free_download_for_laptoprhoi5.pdfIn PDF document text
    • https://cdn.sqhk.co/pigevikuwi/6gcjjGq/weed_strains_list_with_pictures.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407998/normal_6003434dc4266.pdfIn PDF document text
    • http://gufutaca6.xyz/codecombat_level_13_hack_and_dash_answercq7xg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383582/normal_6001b07c7cb6b.pdfIn PDF document text
    • http://uabiomanix.xyz/pigumapiwazilkho7n.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403805/normal_602d6418b1fe0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00011cbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CBE 5468 bytes
SHA-256: 2a55a6b40c4ce26e1d11960fc63ad3abdad108efee780b53b2b6cb23e96f2d5a
font_01_sfnt_off00012f6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F6A 11116 bytes
SHA-256: bfb39933a561ab53b80b2935765ebc0b2298a39275c36deb433044dd5bd12460

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