Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b75ca0156da9683…

MALICIOUS

PDF

83.2 KB Created: 2021-03-18 19:01:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a2631f54f9822e12d95ebb643bfdc4e SHA-1: 6ea1d45884675258b2d3fb14a8ed20355439d23d SHA-256: 1b75ca0156da96830ad2dbbb7230a5f402041428cc14d33358cc3293c9b62a9e
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/award?keyword=bangsamoro+basic+law+pdf+2020'. The ML classifier also flagged this PDF with high confidence. While no scripts were extracted, the presence of malicious links suggests the document is designed to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/award?keyword=bangsamoro+basic+law+pdf+2020
    • https://static.s123-cdn-static.com/uploads/4411682/normal_5fdedb644e389.pdf
    • https://cdn.sqhk.co/vivutazawi/w0jaibG/london_a_travel_guide_through_time_review.pdf
    • http://rowewuxeg.getenjoyment.net/61229826862.pdf
    • http://fezatubiwe.getenjoyment.net/80358500627.pdf
    • https://cdn.sqhk.co/libegavezu/wgdhhVc/medicinal_plants_startup.pdf
    • https://cdn.sqhk.co/pixisuja/xgi4iaE/38416156273.pdf
    • http://radanews.site/hanging_tree_piano_sheet_music_easyudq51.pdf
    • https://cdn.sqhk.co/dalubevemex/n5I0hhW/77604514101.pdf
    • https://cdn.sqhk.co/vilitemeru/igTEngf/blue_bottle_fly_infestation.pdf
    • https://cdn.sqhk.co/gusiloxi/i4dggg8/bricks_breaker_king_level_238.pdf
    • https://static.s123-cdn-static.com/uploads/4426953/normal_5fe4659098fe4.pdf
    • https://cdn.sqhk.co/wewidipo/42HIPje/25402379816.pdf
    • https://cdn.sqhk.co/joxezexukub/icssFjc/raxanaxiroti.pdf
    • https://cdn.sqhk.co/fetebutujo/WhghaFR/46905167036.pdf
    • https://cdn.sqhk.co/guzoladip/gdhehgu/27967762651.pdf
    • http://vashe-zdorovie.xyz/s_class_fighter_no_mans_skyd98k4.pdf
    • https://static.s123-cdn-static.com/uploads/4458163/normal_5fcd2711267f6.pdf
    • https://static.s123-cdn-static.com/uploads/4471109/normal_5fec3191ed890.pdf
    • http://nunovoxiwanafuz.getenjoyment.net/niwulowusajipasitim.pdf
    • http://bitcoins-profits.com/54231517943rzq5a.pdf
    • https://cdn-cms.f-static.net/uploads/4444371/normal_5fdabc7df2dab.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/6d3c29ba-b13d-47e8-8794-b1d1aa4986b0/sujagitikonori.pdf
    • http://lanosebezazov.onlinewebshop.net/38549639646.pdf
    • https://uploads.strikinglycdn.com/files/3e38bd60-7362-4ce1-b5f6-99c0c0a374ab/zakejubewogusasek.pdf
    • http://jumepenitujox.atwebpages.com/71509677780.pdf
    • https://uploads.strikinglycdn.com/files/33b4a267-4dcc-4e2b-9b9e-3abecddf99bf/whirlpool_fridge_ice_maker_not_working_but_water_does.pdf
    • https://uploads.strikinglycdn.com/files/d07aaec2-6eff-4519-ba6c-11363921334b/91669006912.pdf
    • https://uploads.strikinglycdn.com/files/31b86b8f-8e83-4569-9e2d-7453d8792d47/67378127348.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106ad.bin
010c521c96c83a3ab60ae8371ef0e728a3acbb99e52a3b945cb5c2dde64c4bb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106AD 6032 bytes
font_01_sfnt_off00011b37.bin
346d6b8d2651fea6bf70624e1def7f71ec0dd79b8dc2d8ac473609a0964a73f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B37 11044 bytes

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