Malicious PDF — malware analysis report

Static analysis result for SHA-256 c499478b8aa0af8f…

MALICIOUS

PDF

79.2 KB Created: 2021-03-31 00:36:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d9c12a6b5a2e193d4265d6bfe6dddfa5 SHA-1: 534a7ad3441f129b0a933e3df17ad77c0cb18330 SHA-256: c499478b8aa0af8fe2cbb4755773a75ccb584904d25fa755506f51b3f3461617
126 Risk Score

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://gimoguvi.ru/123?utm_term=british+accent+learning+software+free PDF link annotation
    • http://sutobep.getenjoyment.net/75542200400.pdfIn PDF document text
    • http://tupaxeguna.scienceontheweb.net/32095356.pdfIn PDF document text
    • http://derifupiwa.mypressonline.com/wedding_card_design_online.pdfIn PDF document text
    • http://idealslimitalia-official.site/war_of_the_spark_forsaken_plot_summaryel7qn.pdfIn PDF document text
    • http://reweder.site/zuwifemijotibumooxmd.pdfIn PDF document text
    • http://3203epworthcres.com/kriya_yoga_initiation_ukiy5ew.pdfIn PDF document text
    • http://vexetifiridik.mypressonline.com/89304106703.pdfIn PDF document text
    • http://lulizukudomiz.scienceontheweb.net/nuwafubet.pdfIn PDF document text
    • http://tejidirexe.mywebcommunity.org/47161295227.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xejojud.epizy.com/zemoxisovexudikubalotan.pdfIn PDF document text
    • https://65d0a56f-4074-4e8f-9acc-29e6f8e8f663.filesusr.com/ugd/37655d_255b33745ab54c729ef2b47a9fc32d2f.pdf?index=trueIn PDF document text
    • https://7835c217-6b95-46a1-915a-76cdebae3fe0.filesusr.com/ugd/debfb4_83dfb56d7346454aa03693b67c4e02aa.pdf?index=trueIn PDF document text
    • http://tuzikarowom.epizy.com/wemaxijutawuwup.pdfIn PDF document text
    • http://satogitexuvo.myartsonline.com/manual_bpmn_2._0_espaol.pdfIn PDF document text
    • https://6acbaf94-bc62-4fdb-9a00-914544f0b606.filesusr.com/ugd/3ee118_ea2cdc13567745e0ad33f214405b251c.pdf?index=trueIn PDF document text
    • https://8e0cabef-d481-4215-b437-8a5fc4e4723c.filesusr.com/ugd/f41140_d1d4155c5f71416ba2a44abf736f3aef.pdf?index=trueIn PDF document text
    • http://wipupafe.rf.gd/cultivo_de_cactus_y_suculentas.pdfIn PDF document text
    • https://92ddf5cc-4ce7-4caf-b117-8241c553a727.filesusr.com/ugd/42bae0_744fe70d2ed649f28bb36b5143ff89a8.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D5 5284 bytes
SHA-256: b7b010181f1036a8feb4930e395e961648c975497f805aebe4172ae9951055c0
font_01_sfnt_off0000f4dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4DD 10544 bytes
SHA-256: 865d33bc20e8c9fb0038e09a7efabd6d6a4f6b3a69cc2ff698351b450364fba0
font_02_sfnt_off000118f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118F8 16060 bytes
SHA-256: 2173a1880e9f774f759393e7d0d28dda91d04d8a3eae6bea41b822770b343b90

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