Malicious PDF — malware analysis report

Static analysis result for SHA-256 7510ac4fb7ee10bc…

MALICIOUS

PDF

69.6 KB Created: 2021-03-24 12:50:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 430dc85e3288f4a9d7d6961409ac4c42 SHA-1: a889e1234405e6b636d92d467d652a2c8924409e SHA-256: 7510ac4fb7ee10bcde76a4db272a54bac2c21994817770da8b8d989d30b779f3
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 0.9996

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://lozipotod.ru/123?utm_term=aruba+clearpass+datasheet+espa%25C3%25B1ol PDF link annotation
    • http://lojotiwutorolad.22web.org/13981151637.pdfIn PDF document text
    • http://beremoter.online/cv_uk_template_freeq86co.pdfIn PDF document text
    • http://zekabivalejasaj.22web.org/avengers_font_style_photoshop.pdfIn PDF document text
    • http://wordsideget.top/somevipasajrs0q.pdfIn PDF document text
    • http://reestr.site/cisco_ccna_exam_question_typesy0lpx.pdfIn PDF document text
    • http://jetolad.iblogger.org/98026859692.pdfIn PDF document text
    • https://cdn.sqhk.co/zaviresodew/thgJnj4/box_office_collection_of_hollywood_weekend_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/xikotoxerov/h2LHPid/gravitrax_starter_kit_sale.pdfIn PDF document text
    • http://bathforlegs.xyz/92790441545n277a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gesasodalunaka.epizy.com/very_informative_meaning_in_malayalam.pdfIn PDF document text
    • http://duxejuxaxeze.epizy.com/bangladeshi_hasir_comedy.pdfIn PDF document text
    • http://tefefusojobus.rf.gd/leave_application_format_for_employee.pdfIn PDF document text
    • http://benugafudom.epizy.com/facetime_video_call_answered_on_another_device.pdfIn PDF document text
    • http://menimilerawapo.rf.gd/mujemisug.pdfIn PDF document text
    • http://nowavef.epizy.com/51076405808.pdfIn PDF document text
    • http://gasukexopesifu.epizy.com/34789947307.pdfIn PDF document text
    • http://fibalikirikoti.epizy.com/une_formation_en_alternance_traduction_anglais.pdfIn PDF document text
    • http://ninonasoligu.rf.gd/aha_guidelines_for_sbe_prophylaxis.pdfIn PDF document text
    • http://meduzifovum.epizy.com/interview_form_template.pdfIn PDF document text
    • http://winewododures.epizy.com/air_pollution_essay_in_telugu.pdfIn PDF document text
    • http://ruguwozud.epizy.com/monsters_vs_aliens_susan_gets_captured.pdfIn PDF document text
    • http://baloxes.epizy.com/sovinuselumitanukoxobote.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_off0000d16e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD16E 5504 bytes
SHA-256: 6190d0cb200439d6ce63a3e4a3643f14baf832ac2f329918b3fc8c9e8f47ba33
font_01_sfnt_off0000e3d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D3 10220 bytes
SHA-256: 2d0da36dfa13cc41e34b35f922cbcaafba621160e7cd6ae5dba67d849e7ab199