Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c129a1a7a36c9bf…

MALICIOUS

PDF

80.8 KB Created: 2021-05-10 21:28:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7447a9af7071620a34b4d23a10aa5c3f SHA-1: c9a2b39ef36d7de82790e5752f42ec26d4c3fcdd SHA-256: 6c129a1a7a36c9bfe68ee193a457a8269657afc32096378122b57a2549d4698b
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a fake browser/software-install lure. 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 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://baarspo.ru/strik?utm_term=does+jersey+mike%2527s+give+senior+discounts PDF link annotation
    • http://qqkaxes.xyz/hcl_appscan_standarde6kfs.pdfIn PDF document text
    • http://filfex.ru/jemosozuforugixodimwkoy.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/jigezilor/kemidenixivuti.pdfIn PDF document text
    • http://lepefefila.epizy.com/abc_attributes_of_god.pdfIn PDF document text
    • http://muziranaxu.rf.gd/dir-615_wireless_n300_router_configuration.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/86995244102.pdfIn PDF document text
    • http://budobilososuw.rf.gd/aplicativo_netflix_para_android_7._0.pdfIn PDF document text
    • https://2d130471-2a64-48ba-87cf-8f1e86c6acad.filesusr.com/ugd/9c43ec_0dd69a2440c24002a311e001145d9744.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/maridhas_answers_latest.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/who_is_the_prince_in_the_kiss_of_deception.pdfIn PDF document text
    • http://xobalemokalud.epizy.com/sivegitadigekuk.pdfIn PDF document text
    • http://lejubegow.epizy.com/degipixagovanu.pdfIn PDF document text
    • https://cb47f074-0476-4434-b381-5672a365cab8.filesusr.com/ugd/c46c8a_5a2163deb85b4c57b2bb9588f2de0087.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/metro_exodus_ing_content_bug.pdfIn PDF document text
    • https://s3.amazonaws.com/xeruxaxer/diagnosing_sepsis_guidelines.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB40 5352 bytes
SHA-256: dc5c560cbead58c1b90bd0720089b4f7895194e026950423cc97af3676904d61
font_01_sfnt_off00010d8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D8A 11888 bytes
SHA-256: 5e07c1f6584bfce31db022e7b26179cf6f93c902da593422ec5ed7cda49da4e4

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