Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdc3596f9e17e799…

MALICIOUS

PDF

77.2 KB Created: 2021-04-01 15:41:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 696dbb2a8572f423299f2a21701c67f8 SHA-1: 4a0bb74c9b785b00cbb2835a6c6bf8d66673686d SHA-256: cdc3596f9e17e799f7146447145ccfeb9e0b411e5f4b8a4a11ddfe829a72531d
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The primary malicious URL identified is https://jumiwimov.ru/wix?keyword=2013+vw+gti+owners+manual, which is presented as a search result for a vehicle owner's manual to lure victims.

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://jumiwimov.ru/wix?keyword=2013+vw+gti+owners+manual PDF link annotation
    • http://jabilevij.mypressonline.com/geporuxojaxavepuwepotukol.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450733/normal_5fe08cab58f33.pdfIn PDF document text
    • http://woxuruko.medianewsonline.com/fupowi.pdfIn PDF document text
    • http://mavafesumej.medianewsonline.com/fevoxaxoketegurosaz.pdfIn PDF document text
    • http://fosireditoj.mygamesonline.org/analog_and_digital_electronics_notes.pdfIn PDF document text
    • http://fijubigatusurov.scienceontheweb.net/adobe_acrobat_converter_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385869/normal_60526fcd33e93.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/botepesatidum.pdfIn PDF document text
    • http://kavibajegis.onlinewebshop.net/the_lottery_by_shirley_jackson_short_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/facebook_page_manager_apk.pdfIn PDF document text
    • https://8eccd3b7-fb20-4588-a5b5-4d8c58591879.filesusr.com/ugd/0e6328_2f977b2b7fcf4ae8bb18c103d86343d8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/aplikasi_primo_terbaru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92f76312-2112-44ed-876f-076133a42962/39966624377.pdfIn PDF document text
    • https://de2a8dfc-dc8d-4d62-be3b-f97abdd17bf6.filesusr.com/ugd/c722c2_83eceeb6787a45bab87f71e6d2ef9fc6.pdf?index=trueIn PDF document text
    • http://jaweratiz.atwebpages.com/argumentos_a_favor_das_cotas_raciais.pdfIn PDF document text
    • https://a121017b-3fb3-450c-9156-48dd71a9bf80.filesusr.com/ugd/07625c_0682f83a7a754ea3918ce89213d20c97.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/afac6327-acb6-47db-b521-3d7984161751/28185242740.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27a285d8-79ee-4e8c-8256-5feecb1b2ff1/pusigiwufeno.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_off0000d93a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD93A 5552 bytes
SHA-256: a210ba880a8ce957c848e5c6f32b2a37d23e965d6814138a14f8897fb828e31a
font_01_sfnt_off0000ec1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1D 11180 bytes
SHA-256: e3214e541f48a5b838f46b130113c8cb1a64b326030428010c86cbd1eb0a7305
font_02_sfnt_off00011295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11295 16096 bytes
SHA-256: 292b67320f20e7e38814323bff47001ccb55b5eebb397aea8a254f3e91f57b87

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