Malicious PDF — malware analysis report

Static analysis result for SHA-256 b005de48b991f3ec…

MALICIOUS

PDF

83.3 KB Created: 2021-03-28 01:18:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: ba295cb5b16d53ec91968c4a3fd33f8b SHA-1: c59bd4ea1f0bff2c3cef9e178b9b6abeb604df33 SHA-256: b005de48b991f3ec0264529c4e6f306ed6b9a171551940fb54f56ed08e7ad875
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a tactic of using link farms on disposable hosting to obscure the true malicious intent. While no scripts were explicitly extracted, the presence of external links suggests the document is designed to redirect users to potentially malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://baarspo.ru/123?utm_term=blasphemous+game+art+book+pdf PDF link annotation
    • http://paxejunon.mygamesonline.org/horse_calendar_2020_malaysia.pdfIn PDF document text
    • http://leworowotamab.iblogger.org/bumasugenizibevo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453344/normal_603f56551be2d.pdfIn PDF document text
    • https://cdn.sqhk.co/dafibuxoki/h0bhagf/the_game_of_life_vacations_review.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450634/normal_5fd2d085ceacd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502188/normal_5fdf4dc3db6af.pdfIn PDF document text
    • http://ranebixulukaku.iblogger.org/algorithmic_trading_module.pdfIn PDF document text
    • http://zutelotojenexop.getenjoyment.net/how_to_stop_adt_beeping.pdfIn PDF document text
    • https://cdn.sqhk.co/jogekiluse/jchjpuJ/30018784541.pdfIn PDF document text
    • http://gedadekenoz.mywebcommunity.org/how_to_turn_on_an_ipod_nano.pdfIn PDF document text
    • http://posiximuteg.sportsontheweb.net/pavijofavasozufuxolumekom.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://lawewil.atwebpages.com/netgear_wgr614_v6_factory_reset.pdfIn PDF document text
    • https://6b5b785e-7b82-4933-a6c8-7bd064122b77.filesusr.com/ugd/a9248e_48916a52fe8740538a31322616ea2f8a.pdf?index=trueIn PDF document text
    • http://zunonaselopa.rf.gd/los_amantes_del_circulo_polar_pelicula_online_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7aa573b-f271-4289-8048-687e116190ed/carbohydrate_metabolism_concept_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2625ec01-9bfc-451e-bce3-16c3410366c5/delta_loop_antenna_design.pdfIn PDF document text
    • https://5be7aec3-7d66-433b-ae1d-2bfb807ddf2a.filesusr.com/ugd/24deb6_6ada1b18b29e4b9aa85c7b2967209022.pdf?index=trueIn PDF document text
    • https://4d3f6715-1114-433d-a4b7-45a5e22e3858.filesusr.com/ugd/ce86b4_c027f6ebc9754fec960aa15409731e21.pdf?index=trueIn PDF document text
    • https://d38713d8-f9e0-49bf-8e72-3f46774ce551.filesusr.com/ugd/b3faf5_e3724a39cdb94c6ab7d13a5d195e1638.pdf?index=trueIn PDF document text
    • https://e966359d-176b-477a-9ad9-c314bea94227.filesusr.com/ugd/fa6f14_2da911a474214582be0ab67036fa2868.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1a9bb7b-1fe7-4ad1-878c-f6e1da0d9201/debudutepiv.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB34 5436 bytes
SHA-256: c565625f5de5e0101e315dc5c9b4e596f6e96332ea4c5f2a6251b7557a836261
font_01_sfnt_off00010db3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB3 10488 bytes
SHA-256: b91ddd365fbb9d45b44d7079944dfe17ccf13267fa02d56120a19505ae9f7591
font_02_sfnt_off00013153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13153 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176