Malicious PDF — malware analysis report

Static analysis result for SHA-256 36b90b75e0d9d540…

MALICIOUS

PDF

76.3 KB Created: 2021-03-27 13:55:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e0b124963ca077e844ef6eb4b985d7d2 SHA-1: f27fe1eb33f28a38ae550f94bc3e306a0d481680 SHA-256: 36b90b75e0d9d540bcf072743cbd5b6f636b4bb4d3e178cb65050dae47f56a11
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The primary URL, 'https://soxebez.ru/strik?utm_term=weed+eater+38+inch+cut+riding+lawn+mower', appears to be a lure for a specific product search. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

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.
  • 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://soxebez.ru/strik?utm_term=weed+eater+38+inch+cut+riding+lawn+mower PDF link annotation
    • https://sisajubiji.weebly.com/uploads/1/3/0/9/130969075/0dddfb6be6a.pdfIn PDF document text
    • https://mepanomelisegil.weebly.com/uploads/1/3/4/8/134899905/5378082.pdfIn PDF document text
    • https://cdn.sqhk.co/zenekukera/jbQhcCo/daddy_was_a_thief_download.pdfIn PDF document text
    • https://pebuwopaduve.weebly.com/uploads/1/3/4/8/134853156/1a2220.pdfIn PDF document text
    • https://xidoteruredogon.weebly.com/uploads/1/3/1/4/131454367/6384446.pdfIn PDF document text
    • https://cdn.sqhk.co/toneribabut/Tikfjcc/indonesia_business_visa_application_form_download.pdfIn PDF document text
    • https://sawonelezaxiso.weebly.com/uploads/1/3/4/5/134588179/laposo.pdfIn PDF document text
    • https://sunajekivogemaz.weebly.com/uploads/1/3/4/8/134895881/bfcbf.pdfIn PDF document text
    • https://ladunibik.weebly.com/uploads/1/3/4/0/134096621/numijus.pdfIn PDF document text
    • https://lafowujokunoro.weebly.com/uploads/1/3/0/7/130738997/2635259.pdfIn PDF document text
    • https://xujoxufopugapes.weebly.com/uploads/1/3/1/3/131380539/7071827.pdfIn PDF document text
    • https://jijixedo.weebly.com/uploads/1/3/1/3/131398351/6581465.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369794/normal_5fdac005690a7.pdfIn PDF document text
    • https://pixumoxijabana.weebly.com/uploads/1/3/4/7/134748481/xoranademe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382620/normal_603613df57c48.pdfIn PDF document text
    • https://cdn.sqhk.co/dilobowuz/khgJeG8/jakume.pdfIn PDF document text
    • https://berekiba.weebly.com/uploads/1/3/1/4/131482976/9794254.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kenesowozowojaw.myartsonline.com/21736888529.pdfIn PDF document text
    • http://lixugafepujijoj.onlinewebshop.net/layla_candra_malik.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_off0000ec57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC57 5636 bytes
SHA-256: 8627973ff2b9d10ab910260a673b352b8afc8a33827e1a0a9688fa8c6f416762
font_01_sfnt_off0000ff6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6E 10652 bytes
SHA-256: 9d1dd26c6ec930fe2c944a0019543b8e74dab3e7ee6043be4ee07ee6b08305bf

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