Malicious PDF — malware analysis report

Static analysis result for SHA-256 b59884315fd07033…

MALICIOUS

PDF

95.3 KB Created: 2021-02-12 02:06:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 09712ee5937ac1112c35d95aa55020b3 SHA-1: b1b1b47f604b45b7ffceee2204cf731924a7f3be SHA-256: b59884315fd0703386bc625e6384386b3c29f519ff2f2c942aaf35661848c7fd
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable domains and redirector infrastructure, indicating a phishing or malicious content distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to exploit kits or phishing pages. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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.
  • 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/wix?keyword=partes+de+la+celula+vegetal+pdf In PDF document text
    • http://esagafow.fun/pubg_not_ing_from_play_storexo94t.pdfIn PDF document text
    • https://wesoxiworikezux.weebly.com/uploads/1/3/1/3/131380467/04e03787e557.pdfIn PDF document text
    • https://latafixewikokaj.weebly.com/uploads/1/3/4/6/134687196/2678515.pdfIn PDF document text
    • https://cdn.sqhk.co/pubodegosog/CjfgcHf/edmodo_app_install.pdfIn PDF document text
    • http://varnisvakq.ru/lr_parsing_theory_and_practiceyfinu.pdfIn PDF document text
    • https://wavuzujez.weebly.com/uploads/1/3/1/4/131406867/mozimetiperi_bufibenedak_bugomos_kotakivivo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419441/normal_600a9f385e528.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447101/normal_5fe0e13486da2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421960/normal_5fcc6b6b8fe0a.pdfIn PDF document text
    • https://cdn.sqhk.co/fumamimed/4jjhbji/fruit_draw_sculpt_peel_veggies_artichoke.pdfIn PDF document text
    • https://cdn.sqhk.co/gebemiwisero/ib0gigh/1052_horizon_drive_fairfield_ca_94533.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408476/normal_60251e1ac48c3.pdfIn PDF document text
    • https://cdn.sqhk.co/milatepoz/Gd7ie6b/jukamatuv.pdfIn PDF document text
    • http://opssmall.space/new_audit_report_format_2018_in_word91047.pdfIn PDF document text
    • http://foodguideblog.com/65994946039incwx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pusori/25319223346.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/73338103364.pdfIn PDF document text
    • https://s3.amazonaws.com/wupuxus/aiou_admission_form_2018_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/13374626980.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_off000135fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135FE 5384 bytes
SHA-256: 3ed356e1bd59e9c2419e36226de017e3e57d04a3b863bfa17905a205cc0c9e29
font_01_sfnt_off00014868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14868 11648 bytes
SHA-256: 1a92db086311cb644f910382e8ed2a8a7ca9adcc2fc2c0cec590a1686d45d370

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