Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ed10042b7c635fb…

MALICIOUS

PDF

66.4 KB Created: 2021-03-29 23:26:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: d742e8d988e4ee4dacfc037f81465782 SHA-1: 0d8f2fc4d0f65447cb534d39228494489ab490a8 SHA-256: 9ed10042b7c635fb55ca6943df8a454ef347b6175021d4564334fa0fbfae8c7b
126 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with one prominent URL suggesting a phishing attempt related to 'the standard insurance company address'. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware delivery mechanism.

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://zajinet.ru/strik?utm_term=the+standard+insurance+company+address PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4492246/normal_600e6bda1656b.pdfIn PDF document text
    • http://dutarotanazosuv.medianewsonline.com/supply_chain_management_notes_for_mba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382790/normal_6049f59dec65e.pdfIn PDF document text
    • http://pusatokolerax.mywebcommunity.org/personality_adjectives_in_english.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462059/normal_602e27f5544bb.pdfIn PDF document text
    • http://lofupijuwox.22web.org/ledafuvidalofuzoji.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488330/normal_5fc87ae8cb5a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479224/normal_603c5961f0f7f.pdfIn PDF document text
    • http://merotudonor.mypressonline.com/because_he_lives_gaither.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vabizofolimise.epizy.com/angry_birds_2_trailer_in_tamil.pdfIn PDF document text
    • http://muvalinifotu.rf.gd/worksheet_tab_in_excel_definition.pdfIn PDF document text
    • https://1e16f6d7-285b-4488-bf07-d3e24ac90e20.filesusr.com/ugd/417718_0aec91d42bee4ddc8967d9435174f76a.pdf?index=trueIn PDF document text
    • http://jakosorer.epizy.com/one_signal_push_notifications_android_not_working.pdfIn PDF document text
    • http://pimifemegizak.epizy.com/vowewesisowupupi.pdfIn PDF document text
    • http://fusuxitizubuka.epizy.com/ps3_not_reading_disc_eject_noise.pdfIn PDF document text
    • https://efa91360-7c21-416c-9d60-3189e0beb381.filesusr.com/ugd/42ffc7_da41c04e3011478ba91aa06a173d2b1f.pdf?index=trueIn PDF document text
    • http://kepozofa.epizy.com/what_is_the_woah_song_from_tiktok.pdfIn PDF document text
    • http://ripapekum.epizy.com/sword_art_online_light_novel_vs_anime.pdfIn PDF document text
    • http://dorediludopa.epizy.com/sample_classroom_management_plan_template.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_off0000c98d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC98D 5332 bytes
SHA-256: dea2ecb61942b25f2930160bd4c911e20cee417f573f0197d96e0bc41cb062ad
font_01_sfnt_off0000db88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB88 9688 bytes
SHA-256: 4d87011e34b079bd2d763cd8a3bfb83548297c49e474114ca67b82ee282dba8d

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