Malicious PDF — malware analysis report

Static analysis result for SHA-256 f74f9e719fe728c2…

MALICIOUS

PDF

82.2 KB Created: 2021-04-14 17:13:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 489067638115cb3ad5b22e7be08cd4fa SHA-1: e4dc18bda88e29a3fc9a97ab6e38da8bfe303f92 SHA-256: f74f9e719fe728c2c0198d60c346cb196c30c2bb187d8ec4d6cfbef0ab7734fa
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to external, low-reputation domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of external URIs and the link farm heuristic indicate the document's primary purpose is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://vilenefex.ru/strik?utm_term=2002+polaris+ranger+500+wiring+diagram PDF link annotation
    • http://dalosizofovabes.medianewsonline.com/51275952251.pdfIn PDF document text
    • http://govuxojikasumot.scienceontheweb.net/33136905461.pdfIn PDF document text
    • http://lighterusb24.site/gothic_3_guide_jgerolqba.pdfIn PDF document text
    • http://photoforce.ru/diono_radian_3qxt_reviewwf2qw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367275/normal_5feb4039ab83e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492593/normal_5fde8b53e9fd7.pdfIn PDF document text
    • http://nonly.xyz/net_framework_tutorial_for_beginnersvt475.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469378/normal_5fd6ccc6d94e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425214/normal_60465b509c465.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469106/normal_5fd92a7e003eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377908/normal_600c3be78cc33.pdfIn PDF document text
    • http://sayfelengs.space/tension_pole_shower_caddy_walmart_instructionsfg5dq.pdfIn PDF document text
    • http://kameregeperiwaz.22web.org/bacillus_thuringiensis_kurstaki.pdfIn PDF document text
    • http://bred-enligne.com/86840455640lqabg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wutesejib.onlinewebshop.net/kaworadonovedevexunugale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c121cf0-b979-4bc5-83c0-8b1d50a82781/baxibelusofudalu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14f943cd-d560-4b04-afe6-056fec421e1d/how_much_does_an_international_wire_transfer_cost_bank_of_america.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f695f9d1-07be-44ed-8c39-58803b24037c/rigol_ds1054z_ultrascope_software.pdfIn PDF document text
    • http://gugonit.epizy.com/12563411619.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3896180f-f8ed-479d-a82a-b569128cfc41/16460497107.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF4 5672 bytes
SHA-256: 305140ee155e55da1c8b1b45a65c82bb68fa4b68cd031ffd0acb33d0e0fe04c4
font_01_sfnt_off00010042.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10042 10624 bytes
SHA-256: 8f7297859e808a2e14f1fde831a0d819c6006887cf05d9119d46b2e0a7cef3ba
font_02_sfnt_off0001247e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1247E 16160 bytes
SHA-256: 9ffc405fbed68b1ed35cf25504b2a045b5802e2074cf99e6920a228075e829fc

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