Malicious PDF — malware analysis report

Static analysis result for SHA-256 b867d0e5f1583e32…

MALICIOUS

PDF

72.3 KB Created: 2021-03-30 15:00:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: c7dee7816f7333203520c24fa3d08547 SHA-1: 5970bb6e2ed316e28971d739cdc69f0ec8146fad SHA-256: b867d0e5f1583e32e097fab24e09ca6d0bed02c19d5f6d3ebac53a3dc90ad9d7
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to potentially harmful sites. The presence of external URIs and the ML_NYX_PDF_MALICIOUS heuristic strongly suggest a malicious intent to lead users to compromised or malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://maypoin.ru/wix?keyword=addictive+unblocked+games+sprinter PDF link annotation
    • http://diluzadumavotux.getenjoyment.net/application_letter_sample_for_fresh_graduate_accounting.pdfIn PDF document text
    • http://zonuvak.medianewsonline.com/what_is_ethics_in_sport_management.pdfIn PDF document text
    • http://xulazawelinuze.scienceontheweb.net/agricultural_economics_course.pdfIn PDF document text
    • https://cdn.sqhk.co/bavomizobe/d3jeAjj/30483061432.pdfIn PDF document text
    • https://cdn.sqhk.co/reserujaj/hgH9iic/cartoon_channels_on_dish.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwozavenu/ajaibgH/58168195854.pdfIn PDF document text
    • https://cdn.sqhk.co/jadepibake/czJifgg/33466400562.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377647/normal_604a4c6c20a8b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443619/normal_60082c2a3d0ea.pdfIn PDF document text
    • http://tonevagewalilu.medianewsonline.com/why_is_my_iron_not_steaming.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498893/normal_600ca37102fd1.pdfIn PDF document text
    • https://cdn.sqhk.co/kasuwajavi/IrEiegg/vuwuvibek.pdfIn PDF document text
    • http://konalofasu.mywebcommunity.org/ripewoxarugigusir.pdfIn PDF document text
    • http://vumexovuvelafe.medianewsonline.com/25108268892.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471252/normal_5fcc5f2c9341c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424647/normal_60617e7eb41ba.pdfIn PDF document text
    • http://puvepum.getenjoyment.net/fanufinoj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ziwemasux.myartsonline.com/kenmore_elite_he3_gas_dryer_parts_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c6cc4b3-20fe-4e88-a84b-8cd68a7d3522/xewifosilewepedolu.pdfIn PDF document text
    • http://senawoxagijajo.onlinewebshop.net/63415384844.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07f178fa-f5fb-43e4-8b6f-9e4fced653aa/does_a_2008_ford_escape_have_4_wheel_drive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8aaef775-e32b-4727-89c5-048c5df03667/96287164060.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_off0000db74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB74 5648 bytes
SHA-256: 0c7e1492007b6dbee03d408b51f16c80a433dc051170349393b98d2a53fe373a
font_01_sfnt_off0000ee92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE92 10332 bytes
SHA-256: 528db66e075c96a35ba5014b1865158dea22f635ee3386cfc9021447fcfcaa8c

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