Malicious PDF — malware analysis report

Static analysis result for SHA-256 2593d6b2e385798d…

MALICIOUS

PDF

76.8 KB Created: 2021-03-02 23:43:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 00e40cbf9b05408a36ee5ca698f19fe4 SHA-1: e51381b5a8e11168b279e0d228b6079df5f10237 SHA-256: 2593d6b2e385798d490f0ac9adbd6ee05ca28334e506e3f5fda2f2b22e3f73d5
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful 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://soxebez.ru/123?utm_term=el+llano+en+llamas+resumen+yahoo PDF link annotation
    • http://return-0.com/50079380057hkdfr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422640/normal_5fe4928939c7e.pdfIn PDF document text
    • http://tryporte.xyz/70643075784l9uxx.pdfIn PDF document text
    • http://grinallex.shop/33668949422weoo3.pdfIn PDF document text
    • https://jajugodi.weebly.com/uploads/1/3/4/9/134902248/poxaxirepuvad-bilaxuwib-powugifa-pekataxodot.pdfIn PDF document text
    • http://davilebut.66ghz.com/65285308633.pdfIn PDF document text
    • https://zanirifut.weebly.com/uploads/1/3/1/4/131407922/korevidujuwup.pdfIn PDF document text
    • https://votivugaxowo.weebly.com/uploads/1/3/1/1/131163932/553849c8.pdfIn PDF document text
    • http://finofoze.22web.org/25558672125.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377908/normal_602bb36b55e65.pdfIn PDF document text
    • http://sfr-espace.best/86073701490ncfn4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447086/normal_5fcd093a6350c.pdfIn PDF document text
    • http://liketime.fun/25636243271su09n.pdfIn PDF document text
    • https://lanoxujuzon.weebly.com/uploads/1/3/4/6/134630121/panak.pdfIn PDF document text
    • http://capridigi.com/how_to_use_comcast_remote_controlbvwey.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vulomalizekuvu.rf.gd/www.bpsc.gov.bd_job_circular_2020.pdfIn PDF document text
    • http://zekovulelopur.epizy.com/cascading_style_sheet_free_full_version.pdfIn PDF document text
    • http://bidasumibave.epizy.com/talking_tom_game_uptodown.pdfIn PDF document text
    • http://nofadokar.rf.gd/heads_up_email_template.pdfIn PDF document text
    • http://sufapasikan.epizy.com/nanujakowawazajurubo.pdfIn PDF document text
    • http://gilesab.rf.gd/8898578533.pdfIn PDF document text
    • http://xusonusoxe.epizy.com/3d_poser_software_free.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_off0000ef3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3D 4984 bytes
SHA-256: 4d3c47f8096dc24a761839377d9135d82a8024c3388f5c252df56374b628735d
font_01_sfnt_off00010007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10007 11416 bytes
SHA-256: ade04383de3bbf974ffe86a1777da9fdc7ab7a1c2e4403998b30878ac2b02aac

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