Malicious PDF — malware analysis report

Static analysis result for SHA-256 32b4f7d7bc6fbc69…

MALICIOUS

PDF

77.7 KB Created: 2021-03-19 11:48:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 690e6d4a97dbfd0493f10314e6339678 SHA-1: c1c71e4ed50b7a91121926b88f9bdd23336f1771 SHA-256: 32b4f7d7bc6fbc69ff91c54ebae673198e2fbd98c6df9dbb45b217b92006694f
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 part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The file's structure and embedded URIs suggest it's designed to redirect users to potentially harmful content.

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
  • 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://lozipotod.ru/award?keyword=understanding+comics+scott+mccloud+pdf PDF link annotation
    • http://auth02mobility.com/que_dia_feriado_de_carnaval9fjns.pdfIn PDF document text
    • http://sizuxofutitarax.mypressonline.com/crock_pot_smart_pot_7_quart.pdfIn PDF document text
    • http://kfnwejfnkwheklf.space/3._5_necropolitanlcb10.pdfIn PDF document text
    • https://cdn.sqhk.co/pevejotomoma/2hd8bXd/22334920167.pdfIn PDF document text
    • http://famozosivupiwij.sportsontheweb.net/no_matter_the_wreckage_table_of_contents.pdfIn PDF document text
    • http://bred-enligne.com/antenna_wave_propagationb1wg3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403410/normal_6019a2791041e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454561/normal_5ff55a373bc8b.pdfIn PDF document text
    • http://mizifasurogik.mywebcommunity.org/70484650773.pdfIn PDF document text
    • https://cdn.sqhk.co/lunexubafexo/cic041a/safari_20sg_pesticide_label.pdfIn PDF document text
    • https://cdn.sqhk.co/janawezexoj/haZSiaP/81837484992.pdfIn PDF document text
    • http://ukranews.icu/kenmore_portable_dishwasher_665_manualvymit.pdfIn PDF document text
    • http://ita-talia.fun/aoac_2007._01k30i9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://manosotidokef.myartsonline.com/administracion_de_recursos_humanos_gary_dessler.pdfIn PDF document text
    • https://1e16f6d7-285b-4488-bf07-d3e24ac90e20.filesusr.com/ugd/417718_701178c6b6924e3db571175154a99c47.pdf?index=trueIn PDF document text
    • http://dapufojutujat.atwebpages.com/booth_multiplication_algorithm.pdfIn PDF document text
    • https://22520ec4-2132-45a5-98b8-54db1b71d3ea.filesusr.com/ugd/b33b96_fae3fbe5ef664b079d26040deaa6f4eb.pdf?index=trueIn PDF document text
    • https://88966db1-4a83-4446-b941-f65022a6235f.filesusr.com/ugd/928e0f_bf2ce11d242d42bb9cff1b3b6dfa95f2.pdf?index=trueIn PDF document text
    • http://koradanizepagow.myartsonline.com/valitododatuvavodegiru.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_off0000f048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF048 5468 bytes
SHA-256: 3178c2cc8c938411e8ecde4c60cc9f75402c695fc4baa0036ff74a1a82032434
font_01_sfnt_off000102d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D1 11596 bytes
SHA-256: 3f853f444a46767a75acb940fb6f7a1b248ee27e03334124f212323ea2588a57

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