Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd9be8105075dce0…

MALICIOUS

PDF

97.2 KB Created: 2021-03-16 04:54:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 603f98bd6bb03e23ab8fc97c23fce872 SHA-1: 697695a279936517192d8ea32131d708cdbd1f67 SHA-256: cd9be8105075dce0ff8825ba6b459134a40f190673fc340d688ac36de9fa2ad1
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to exploit users by directing them to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://bologen.ru/award?keyword=angular+4+tutorial+pdf PDF link annotation
    • http://vazifesi.iblogger.org/how_to_refill_diaper_genie_expressions.pdfIn PDF document text
    • http://poxumanavofeboz.scienceontheweb.net/68568460813.pdfIn PDF document text
    • https://remogomati.weebly.com/uploads/1/3/4/7/134748537/tenijoxeredeg.pdfIn PDF document text
    • https://sowibize.weebly.com/uploads/1/3/5/3/135348762/zalexuvafa.pdfIn PDF document text
    • http://dujosibixejo.22web.org/fur_elise_piano_sheet_free.pdfIn PDF document text
    • http://paselon.getenjoyment.net/golumufivegasoviwib.pdfIn PDF document text
    • https://katalulipof.weebly.com/uploads/1/3/2/7/132710678/3847179.pdfIn PDF document text
    • http://dobilarujokux.sportsontheweb.net/pan_african_parliament.pdfIn PDF document text
    • http://vuvatemubo.iblogger.org/38597777561.pdfIn PDF document text
    • http://hotita.fun/90392298433kz3z2.pdfIn PDF document text
    • http://takipibimaxubov.sportsontheweb.net/watsons_go_to_birmingham_summary_chapter_1.pdfIn PDF document text
    • http://tumbochka.space/sokoredavenenezabofa2j6ei.pdfIn PDF document text
    • https://tovuwofox.weebly.com/uploads/1/3/4/7/134731163/xedomubevezawawitor.pdfIn PDF document text
    • http://lemafesopeposuz.mywebcommunity.org/vefepi.pdfIn PDF document text
    • https://letavozogat.weebly.com/uploads/1/3/5/9/135978758/fudulimaket.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://07d68bf2-0661-47e2-9ffe-eae068a071af.filesusr.com/ugd/fef806_9ea7fb4d609f4dab95c4e254d718a14d.pdf?index=trueIn PDF document text
    • http://xefesogojodegu.epizy.com/administracion_de_medicamentos_via_topica_ventajas_y_desventajas.pdfIn PDF document text
    • http://xolazituvote.epizy.com/fire_report_colorado.pdfIn PDF document text
    • https://2a983b51-2e13-4971-8c1f-a5bca3ab4353.filesusr.com/ugd/e1a791_d4d5fec3495146d684871904c24983d6.pdf?index=trueIn PDF document text
    • https://cd70d4e5-4a1a-4071-96d1-f2415ea5ece1.filesusr.com/ugd/7f46b5_8eda10ad3a414227af12f160ac903de2.pdf?index=trueIn PDF document text
    • https://b913155d-2712-4fd4-bcc6-651970a8c456.filesusr.com/ugd/e39924_0d83d46f50234897a4358e29407efa2e.pdf?index=trueIn PDF document text
    • https://a6668164-4238-4e0d-addb-cc4c62f58fca.filesusr.com/ugd/2dfcca_7163990ed19f48b69c3c2e6aa40b81eb.pdf?index=trueIn PDF document text
    • https://f733e552-90a1-4d1f-83ca-a6b36afcf31c.filesusr.com/ugd/38bf1f_f0c11832a8a74240989dac43a63da973.pdf?index=trueIn PDF document text
    • https://b5b764bc-4fc6-48d7-9a4b-423a4d05f225.filesusr.com/ugd/3f2390_9c786850e87e458cb4a8158a778f010c.pdf?index=trueIn PDF document text
    • https://ec5c17a1-061e-4a2c-a9e6-b3561ba71229.filesusr.com/ugd/299074_ea5ab04895d140848e42c51dc3c6bffc.pdf?index=trueIn PDF document text
    • https://917ed8d3-8a9f-4c5c-a3ad-554e533308ad.filesusr.com/ugd/a4e402_663e1105cb8948278d19d8c2993e32c7.pdf?index=trueIn PDF document text
    • https://53860ffb-5975-4088-b838-5c82367c2827.filesusr.com/ugd/0d2908_a879c6f09cb74d67bb280744afb3b010.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012da3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DA3 4872 bytes
SHA-256: 9d97f4c28ac24dd172070e77991eb81298703daccbefea1e128d8493c0d79579
font_01_sfnt_off00013e3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E3F 12132 bytes
SHA-256: 739929965d4909a908ad9227ef47d26e089c8bfefd2235dc41be044843d159c6
font_02_sfnt_off0001676d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1676D 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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