Malicious PDF — malware analysis report

Static analysis result for SHA-256 1834bba10448f9bd…

MALICIOUS

PDF

85.8 KB Created: 2021-04-02 15:00:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6fa6effa073108588090b622ce7e3c83 SHA-1: b71f96863edf28c99e2660c5934a46a7ef01ffd4 SHA-256: 1834bba10448f9bd30c9530e1ac31ea1f8b15b4bfe0d0f8aee97c2eeedcdeb8b
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a "PDF_SEO_LINK_FARM". The primary external URI points to a URL containing "swot analysis definition pdf journal", suggesting a deceptive lure. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely related to phishing or traffic generation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://jumiwimov.ru/award?keyword=swot+analysis+definition+pdf+journal
    • http://pobunav.sportsontheweb.net/inheritance_series_book_6.pdf
    • http://gaximivotekole.mypressonline.com/fotimakulufetevozez.pdf
    • http://lazategomid.scienceontheweb.net/vadawatoke.pdf
    • http://belepebo.mywebcommunity.org/inductive_and_capacitive_reactance.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cd70d4e5-4a1a-4071-96d1-f2415ea5ece1.filesusr.com/ugd/7f46b5_82210492597c48a3901bd4d1ff28c463.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f6746344-f049-414b-9547-b68f22f6d799/91421735564.pdf
    • https://619c993e-e215-4b07-891b-88776ecab8c8.filesusr.com/ugd/1fce43_f9cb28dbf08e43bc9223db19727a4026.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c1b8b5ec-5545-441f-836e-397fbeca1d2b/gurajixekowotixonotuverow.pdf
    • https://s3.amazonaws.com/regufojalojaza/landscaping_business_proposal_template.pdf
    • https://82cb18f6-4a40-4824-ac11-10070f72ce02.filesusr.com/ugd/5aec95_b845a751ffd34ad3b94dbcc54350e17e.pdf?index=true
    • https://s3.amazonaws.com/gogoxowiniza/danby_designer_portable_dishwasher_manual.pdf
    • https://aeedc83c-a41d-4179-9d48-e770e4c4cd47.filesusr.com/ugd/e010a7_c0f31b3892814620b92b19b766a7ba77.pdf?index=true
    • https://uploads.strikinglycdn.com/files/dd98c40e-448c-4a42-8502-015ef5db20a4/kerotibiguraviturupib.pdf
    • https://s3.amazonaws.com/pirofopafu/89451174449.pdf
    • https://99470c7d-c692-4648-a7b8-36ea19db2883.filesusr.com/ugd/ab059d_ede456587ee141788080ee9f59ca359c.pdf?index=true
    • https://f19d2187-ce67-4d04-8798-eef694565169.filesusr.com/ugd/bd4746_9fe65639e8844a27a6dc2d89bf0dceea.pdf?index=true
    • https://s3.amazonaws.com/fojaxexino/employee_evaluation_template_xls.pdf
    • https://51bf459c-6b46-41b0-863f-532cf8a77e0d.filesusr.com/ugd/2eedf1_05e97baab5724d90a964ed140ff88bca.pdf?index=true
    • https://uploads.strikinglycdn.com/files/6d9c051e-283d-46bd-b25d-90d2030986a4/88463173602.pdf
    • https://uploads.strikinglycdn.com/files/20c54e88-0191-4761-b95a-cd92f87551e0/wifoxegefi.pdf
    • https://uploads.strikinglycdn.com/files/eeced707-0bd5-4ec6-812f-2a4f152dd794/how_to_clean_a_gas_pilot_light.pdf
    • https://s3.amazonaws.com/sigobija/39035237937.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011283.bin
4ada62514fc810fcc4936e759c39da5194e18f7e9998a356ed46b92e0cf8d40b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11283 5408 bytes
font_01_sfnt_off00012516.bin
da153d0389db6d7c6a8256f531c5607525863376e91ceb85b9fe7235eb8f2b57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12516 10728 bytes

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