Malicious PDF — malware analysis report

Static analysis result for SHA-256 969e0e93611cd457…

MALICIOUS

PDF

75.3 KB Created: 2021-03-03 00:55:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0349af81f917b91d8495e5f0d1ae5b83 SHA-1: 936f815ff1f4d50cc9567b7254a89154257ffcfa SHA-256: 969e0e93611cd457d2b648121fcb612aad96b3c2ce7159dfbadf40713c6106c6
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://zajinet.ru/strik?utm_term=honeywell+vision+pro+8000+installation+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4454811/normal_5fff108bb074b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502567/normal_6013a9dde4c7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459628/normal_60210ec50dc4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480758/normal_5fd95b6c67112.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvepelela/gchcijW/how_to_make_stickers_for_whatsapp_ios_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465559/normal_5ff19a3d30866.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491969/normal_5ff990d0e49b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375210/normal_60271d0ac0830.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466662/normal_6012b3680f651.pdfIn PDF document text
    • http://hayatevesigar.online/sakaruletekojamoxoxub42qbo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456728/normal_603d3b350672a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457590/normal_60135934eba08.pdfIn PDF document text
    • http://marafonsport.site/732264122394hist.pdfIn PDF document text
    • http://ridunculus.com/39611552194n7jud.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490141/normal_6003477088008.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://karajifaderiwow.epizy.com/baby_laughing_sound_ringtone_free.pdfIn PDF document text
    • http://genovadeni.epizy.com/url_rewrite_module_2._0.pdfIn PDF document text
    • http://tezebidurob.epizy.com/89202391044.pdfIn PDF document text
    • http://degedudu.rf.gd/mejev.pdfIn PDF document text
    • http://rebagada.rf.gd/iso_13485_audit_checklist_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_off0000e678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE678 5516 bytes
SHA-256: 7136a1611b4aab8740ecc3986ef415f5ada41439fe3872261155eb0a51cb9634
font_01_sfnt_off0000f93a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF93A 11304 bytes
SHA-256: fd9a4b6ec1c316aa665779993841c35126007e6f697625d48dd3528962f70436