Malicious PDF — malware analysis report

Static analysis result for SHA-256 47ee874d0d4aea8a…

MALICIOUS

PDF

80.8 KB Created: 2021-03-12 09:39:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 47e159c288ab9a03b620ffaec281442a SHA-1: 22db8dd32a2117375f6bd7578287c53379b51b2d SHA-256: 47ee874d0d4aea8a5745a2d238257fa31e4970a4cd8a026012c7495c8e7f525f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are flagged as link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a common phishing lure.

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://zajinet.ru/123?utm_term=tcs+bps+interview+questions+and+answers+pdf PDF link annotation
    • https://cdn.sqhk.co/desogepupema/P4xrigh/raid_shadow_legends_characters_to_keep.pdfIn PDF document text
    • http://prodson.fun/african_dance_musicjr0tu.pdfIn PDF document text
    • http://winclean-shop.space/60680706956q93r8.pdfIn PDF document text
    • http://trynutra.shop/what_is_the_mitotic_spindle_apparatus_made_of0f3sk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481828/normal_5fcaa7f4d4cf4.pdfIn PDF document text
    • https://cdn.sqhk.co/zaviresodew/y1gKkha/votanulabufamepesaj.pdfIn PDF document text
    • https://cdn.sqhk.co/gusisitixinu/hjibbvd/logo_quiz_game_online_free.pdfIn PDF document text
    • http://fastgetme.online/additional_mathematics_form_5_notesalwo1.pdfIn PDF document text
    • https://cdn.sqhk.co/lilovenodi/rhdhdih/dungeon_map_maker_5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454167/normal_5fe8bb7fd989c.pdfIn PDF document text
    • http://papotanepif.22web.org/lesson_53_absolute_zero_kelvin_scale_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403556/normal_6019d27ca10b5.pdfIn PDF document text
    • http://nefritthebestthing.site/motorola_talkabout_mt350r_manual_espaol96if7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466140/normal_60382a494a417.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401972/normal_602c757904bc6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://238a82c5-85a8-4641-a991-2f0f5270ddc4.filesusr.com/ugd/63f22d_86041bf64b0a4c9d8f4772f524006a4f.pdf?index=trueIn PDF document text
    • http://gikipixuvi.rf.gd/metric_conversion_practice_quiz.pdfIn PDF document text
    • https://2ddedb0e-b7b0-41c9-a8bc-c018bd0e6e4c.filesusr.com/ugd/70094d_841b692e168042c2a7e28f2cf1198ff8.pdf?index=trueIn PDF document text
    • https://0502d5d0-a0f5-47b8-bc1c-644c46e4e431.filesusr.com/ugd/6cabbb_5cd2d5260bff4a0a8340af59ee98ed87.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/38b70eb7-1b90-4068-9fd1-8c1eadf31198/42997214346.pdfIn PDF document text
    • https://5ee0d2ad-6486-47ce-ab7d-0e7b2bae4193.filesusr.com/ugd/bc0d1e_009a46de762743edb3ce3e9b16daec6a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7ef33a7-6662-4cf9-b305-d4bb19a2b1ed/is_nbc_free.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_off0000feda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEDA 5484 bytes
SHA-256: 03b88fcf24c9cb6e92bd7c26eeb7b69a76e6a18a3f87f6eace155b1aa8e67b6f
font_01_sfnt_off000111a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A2 10544 bytes
SHA-256: a67358825cf495380cdb3cf12aeb67c4d1ab7d06834e478a8c465f3745183ae4

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