Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe17d3c613a4a319…

MALICIOUS

PDF

77.7 KB Created: 2021-03-25 00:54:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 8beca2f6ff9e68ff3e79e279c791eb36 SHA-1: 74fbb63de86113cf42036fa61b08075643f38d41 SHA-256: fe17d3c613a4a319c089de08f9a88a4ff7ecdea2926c455d5f192f01d271fe65
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/strik?utm_term=world+war+z+movie+review'. This URL is likely used to lure victims to a phishing site or download further malicious content. The ML classifier also flagged this PDF with a high probability of being malicious. No scripts were extracted, but the embedded URL is sufficient evidence of malicious intent.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/strik?utm_term=world+war+z+movie+review In PDF document text
    • http://lasleymarkt.ru/28178407783sk53e.pdfIn PDF document text
    • https://cdn.sqhk.co/kigaratak/jgijIzN/65948983304.pdfIn PDF document text
    • https://cdn.sqhk.co/lilomovetum/gg9IgUC/4343025924.pdfIn PDF document text
    • https://cdn.sqhk.co/jugomuzuteb/jhhaddC/soccer_heads_2_player_games_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/zigotimuti/NAHheib/arcane_showdown_strategy.pdfIn PDF document text
    • https://cdn.sqhk.co/letopoto/PifCPhb/best_free_ringtone_app_for_iphone_8_plus.pdfIn PDF document text
    • http://zutumufedige.getenjoyment.net/dog_man_first_book_read_aloud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375509/normal_6043131bbf01c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482629/normal_6052dd82e8b08.pdfIn PDF document text
    • http://my-favshopg.online/maxiscan_ms309_manual_portuguesayasw.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/7dd07801-db3f-47e0-865a-f120d02a2eb8/surface_area_formula_for_right_triangular_prism.pdfIn PDF document text
    • http://xomapagovujux.atwebpages.com/1st_grade_printable_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd7bcbe9-f27e-4e57-9561-4117f895192f/xoxitaxigetitotixe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dfa3cff-0d5c-47cb-8a87-a396a7f2cb16/kenanelovigipowakiwip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5096275-3a36-407a-8c84-19469f1322a5/shure_slx4_wireless_microphone.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_off0000f39f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF39F 5008 bytes
SHA-256: 2321e7d7aa9465bdb311af7961df0677c59a0deefeee62dd94d88a39f5901452
font_01_sfnt_off000104b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104B2 11008 bytes
SHA-256: 3b9005532af2d25d66b0404d112f6817bb23bfd3f03ab2798a3314aa99781e8b

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