Malicious PDF — malware analysis report

Static analysis result for SHA-256 b940192782cbac92…

MALICIOUS

PDF

110.7 KB Created: 2021-03-02 06:31:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2667fd60c586a40c63ba1ab4376f2b7e SHA-1: c60c65017202fb07c0398317ad0894e19778e11b SHA-256: b940192782cbac9215a95566873e313140822b702b4ae0531d076603f8097d8e
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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/wix?keyword=google+sites+ranking PDF link annotation
    • http://sunakijabe.sportsontheweb.net/gazepuwogitadikojijog.pdfIn PDF document text
    • http://wapividazofar.scienceontheweb.net/papirejaxu.pdfIn PDF document text
    • https://cdn.sqhk.co/voxedifi/hmgchei/multiplayer_driving_simulator.pdfIn PDF document text
    • http://kekijojovif.sportsontheweb.net/critical_thinking_meaning_hindi.pdfIn PDF document text
    • http://werewov.22web.org/jujesobapeligobuwadagoj.pdfIn PDF document text
    • http://zeraseb.66ghz.com/87471282976.pdfIn PDF document text
    • http://rixorevu.getenjoyment.net/pigarexajononebew.pdfIn PDF document text
    • https://cdn.sqhk.co/vexapalas/1DjgtmK/23282551588.pdfIn PDF document text
    • https://cdn.sqhk.co/rosisole/ljbBij6/civil_defence_apply_date.pdfIn PDF document text
    • https://cdn.sqhk.co/dutaxato/hjjggjg/cleo_mod_gta_san_andreas_2._0.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/eghvkii/us_civil_war_map_with_border_states.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/kotenu/bowers_wilkins_dm603_s3_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/what_does_under_his_eye_mean_in_handmaids_tale.pdfIn PDF document text
    • http://sidukumu.epizy.com/network_controller_driver_for_dell_latitude_e6410_free_download.pdfIn PDF document text
    • http://gerireg.epizy.com/angular_2_form_control_get_name.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/dusopif.pdfIn PDF document text
    • http://minifuduredejo.rf.gd/67454934275.pdfIn PDF document text
    • http://kixixiwibatogit.epizy.com/free_chili_cook_off_voting_ballot_template.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_off000177bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x177BC 4948 bytes
SHA-256: ad6bb0cda95b3677f1dd00a3c596f37200653183ab27dcc71f5da8ca52fc2cee
font_01_sfnt_off000188ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x188AC 10800 bytes
SHA-256: 38f8c66b623b42a9aef64964fe0843b6c480115b1e32e72b270210ce3436296b