Malicious PDF — malware analysis report

Static analysis result for SHA-256 04730d1f5a433133…

MALICIOUS

PDF

75.4 KB Created: 2021-04-04 18:09:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 523577e109e4f6f11e517ab85a725944 SHA-1: 149354edc24dff3d582200fbe6d8be086e2b6e71 SHA-256: 04730d1f5a433133ffad5058633ffbe905cb94bfe882a5e26dcd6327a2d838ca
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://midufefew.ru/strik?utm_term=wireless+xbox+one+controller+price+walmart PDF link annotation
    • http://true-board1.club/gawafolipagitudaxcduq4.pdfIn PDF document text
    • http://kulofokugizadeb.22web.org/cisco_meraki_mx64_datasheet.pdfIn PDF document text
    • https://cdn.sqhk.co/vozevadijut/Gjbiijg/absolute_rc_flight_simulator_mod_apk_3._52.pdfIn PDF document text
    • https://cdn.sqhk.co/lutotilivik/gg8mii3/counter_terrorist_sniper_shoot_unlimited_money.pdfIn PDF document text
    • http://titoto.xyz/jakomiwikeliguguvuvuxiofvr.pdfIn PDF document text
    • http://markettop.pro/how_to_study_for_usmle_step_1_in_1_month1blj0.pdfIn PDF document text
    • http://gnfcns.info/sangrado_de_varices_esofagicas90thd.pdfIn PDF document text
    • http://tafedudim.22web.org/acronyms_and_abbreviations.pdfIn PDF document text
    • http://particulieres-societegenerale.best/7016426903691boh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gofuwupe.epizy.com/86854567983.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da0f3b77-58ae-4a33-833c-8c37764855b7/50423585984.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/327cb736-c50a-4868-a5a2-878e0d7a0f38/tobajagurimefusoda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/473bcfd2-6157-4a31-8d49-b267e56b3a7b/19588386796.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12d8627d-08ef-4566-be80-131450c6ed60/jaybird_x3_warranty_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef66ffd8-c5cc-4877-ad42-52321a060873/xekilogimaweguwoxozusogu.pdfIn PDF document text
    • http://zoletafexogixa.epizy.com/scatter_plot_worksheet_2_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7708210b-264c-4e6a-b752-0025a45f0706/letifikiremiwedol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de1f99bd-27fc-4e1c-8805-4ee9c32ec275/tabla_periodica_cuales_son_los_elementos_naturales.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b1af39c-6a61-4ec8-b5e7-2db44d1ebc96/fetuv.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_off0000e9de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DE 5392 bytes
SHA-256: b140ad782910ecadf400f88d0a157fe9e2172e04f23e635e7fa292aaf8b3fd1a
font_01_sfnt_off0000fc39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC39 10576 bytes
SHA-256: de1e4b24e236704a78974ba32a072914163dc80f02dd0d6c727e6c1df59673de

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