Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f04229987c08f91…

MALICIOUS

PDF

65.4 KB Created: 2021-03-25 08:19:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70dc1c482170c36a3154871231771a03 SHA-1: e7761f4cc98f4544ee4f994b6fddfc95990b85a2 SHA-256: 2f04229987c08f91a481d323cda0cb9611f508300403d4063ff857bba9d896c4
184 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection indicate malicious intent, likely related to phishing or malware distribution. The embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7991

Heuristics 5

  • 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.
  • 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
  • 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://gimoguvi.ru/award?keyword=oxford+dictionary+of+banking+and+finance+pdf
    • https://vaxofawaz.weebly.com/uploads/1/3/2/6/132682661/1585655.pdf
    • http://pewujok.mypressonline.com/new_air_force_1_plane_cost.pdf
    • https://vezitiratad.weebly.com/uploads/1/3/1/8/131856143/5316622.pdf
    • http://gigezojiradof.scienceontheweb.net/pafonitedurasimigexibij.pdf
    • https://rikulaseno.weebly.com/uploads/1/3/4/4/134471776/6060923.pdf
    • https://tetoxoji.weebly.com/uploads/1/3/0/9/130969306/nibuxuxopa-junujujoranuti.pdf
    • https://tadomowiwelam.weebly.com/uploads/1/3/4/7/134744739/lonowi_sevetepa_dotobelele_janebapejevumi.pdf
    • https://cdn.sqhk.co/kawurefeki/1sghxpj/88566796211.pdf
    • https://cdn.sqhk.co/xekutenupi/gechjfq/world_war_1_facts_trench_foot.pdf
    • https://kinetatosutozi.weebly.com/uploads/1/3/2/7/132740742/27b6512f.pdf
    • https://dunevija.weebly.com/uploads/1/3/4/3/134306837/f5454.pdf
    • https://wimavebitajiki.weebly.com/uploads/1/3/4/6/134609796/nifemopapozu.pdf
    • https://xipurewaxo.weebly.com/uploads/1/3/4/7/134759043/1e7814799a7d49.pdf
    • http://rowowesofazov.medianewsonline.com/osha_safety_manual_template.pdf
    • http://felixojo.22web.org/cisco_anyconnect_secure_mobility_client_admin_guide.pdf
    • http://jofarofuwudeveb.66ghz.com/33132072340.pdf
    • http://pakirekugep.scienceontheweb.net/arihant_verbal_ability.pdf
    • https://faxasuxudoxo.weebly.com/uploads/1/3/2/6/132695360/971da67ee05.pdf
    • https://cdn.sqhk.co/zeritogekuja/gdnghhF/reinsurance_market_report_2019.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://391e4f24-9fc9-4707-ac06-338edcd9f959.filesusr.com/ugd/110ef3_38fb9fb21334438891df172cc9226dc7.pdf?index=true
    • http://kivarutumo.myartsonline.com/autocad_electrical_free_download_for_students.pdf
    • https://ad9e3d1f-bb22-46ca-892e-b6aa3325a756.filesusr.com/ugd/837d34_c357114999a9405e94adc64377a16ad6.pdf?index=true
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5cb.bin
9474aa2fa081950904260ed76e0949f796409ea85159e08ceb3bdf8ff6b36dcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5CB 5512 bytes

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