Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9d4e06bc88812e9…

MALICIOUS

PDF

75.3 KB Created: 2021-04-06 23:22:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 6f2858c5ef2e49cc16ac963be8134c14 SHA-1: ce6abc430530f0ffc304f520fa04bbf4c415bc27 SHA-256: e9d4e06bc88812e986e21060ccf1e5b467069e6b5fabd2423b3e33d03b404289
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable domains and employing UTM parameters, indicative of a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites.

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://jacksth.ru/strik?utm_term=craftsman+chainsaw+carburetor+cleaning PDF link annotation
    • https://sivenusa.weebly.com/uploads/1/3/1/1/131164431/mibumoveje-kokulidip-tuvaxoviveguru.pdfIn PDF document text
    • http://xiwesesakuvel.medianewsonline.com/29136554475.pdfIn PDF document text
    • http://pewodebepefawi.scienceontheweb.net/88025785848.pdfIn PDF document text
    • https://cdn.sqhk.co/vumusokutil/ijlnjhp/megurakujobates.pdfIn PDF document text
    • http://nejupike.mygamesonline.org/45311107172.pdfIn PDF document text
    • https://cdn.sqhk.co/pajubopolak/jgibigh/15967519768.pdfIn PDF document text
    • http://vaxisezawoged.scienceontheweb.net/nextgen_annuity.pdfIn PDF document text
    • http://lodomujimujug.mywebcommunity.org/vesuvulor.pdfIn PDF document text
    • http://sukuwodexi.scienceontheweb.net/44238008828.pdfIn PDF document text
    • http://nupifijaw.getenjoyment.net/bell_hooks_teaching_to_transgress_introduction_summary.pdfIn PDF document text
    • http://tanemazijafawin.medianewsonline.com/58877127800.pdfIn PDF document text
    • https://cdn.sqhk.co/kipafipigifi/ggFpijU/60614064910.pdfIn PDF document text
    • https://nelemiken.weebly.com/uploads/1/3/4/7/134704654/2444669.pdfIn PDF document text
    • http://zijofazasogija.getenjoyment.net/31231698351.pdfIn PDF document text
    • https://cdn.sqhk.co/bokirebi/1jbieie/32247514119.pdfIn PDF document text
    • http://nitesufi.sportsontheweb.net/ejemplo_de_contrato_de_confidencialidad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6dca1d0c-b102-4aa4-a312-d013f97c39dd.filesusr.com/ugd/fb87fb_60882b33e8104e8d86af2b7fb6b5c233.pdf?index=trueIn PDF document text
    • http://dogiwexor.myartsonline.com/arduino_basics_tutorial.pdfIn PDF document text
    • http://kewevagisugimuw.onlinewebshop.net/50014866484.pdfIn PDF document text
    • https://84bd2c60-91d0-47b6-9565-6ae8a6593e58.filesusr.com/ugd/963627_d0dad8a30fca406abb536938eb70f90e.pdf?index=trueIn PDF document text
    • http://pitigapevede.onlinewebshop.net/algebraic_expression_worksheet_grade_6.pdfIn PDF document text
    • http://sorisavitekinuj.onlinewebshop.net/cricket_information.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_off0000e8b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B8 5432 bytes
SHA-256: 8ebae41cb48ae459c28ec1e85afa41097ae17930de6d054a80b6c11c2f634764
font_01_sfnt_off0000fb20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB20 10684 bytes
SHA-256: f9211dbd759c7e8fe12a25dfcf5c04acbf887225bed610229790a112ac78775b

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