Malicious PDF — malware analysis report

Static analysis result for SHA-256 0333111dbee621de…

MALICIOUS

PDF

72.7 KB Created: 2021-03-11 16:10:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 2981a141b40b663ab8d8d1dfdb1a3fd3 SHA-1: 25493e76371eb76be0168e8c4caf4199873a27ce SHA-256: 0333111dbee621de569be480d11e3690d9a72e49daf9254f2cb0c07506439c87
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one pointing to `jumiwimov.ru`, which is flagged as a potential link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://jumiwimov.ru/123?utm_term=bike+logo+png PDF link annotation
    • https://cdn.sqhk.co/solalokazili/ahcbt0l/train_or_taxi_from_paris_airport.pdfIn PDF document text
    • http://eurosett.net/72378096513impnv.pdfIn PDF document text
    • http://thecet.xyz/whats_the_money_cheat_code_for_gta_56l9o6.pdfIn PDF document text
    • https://cdn.sqhk.co/pawekenu/Kahdiix/zolekemexinope.pdfIn PDF document text
    • https://cdn.sqhk.co/dokederajo/kwVyXEJ/charles_law_worksheet_answer_key_page_21.pdfIn PDF document text
    • http://icub.tech/32938073955pw6yg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386839/normal_601e8ae84717c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408001/normal_602a193517714.pdfIn PDF document text
    • https://cdn.sqhk.co/runetonorox/jghvvha/parking_ticket_template_prank.pdfIn PDF document text
    • https://cdn.sqhk.co/puwupasakej/cHTdfgf/hotel_employee_panic_buttons.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fcee199-44cb-4ce0-80d0-d9e3dd621351/pelulewedewawamasukek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06a5e0f0-006f-4aaf-baf5-fd39e5c179ab/who_invented_homework_and_how_did_he_die.pdfIn PDF document text
    • https://c6f55193-7475-4343-97dd-33cb3b141b6a.filesusr.com/ugd/808d8c_41df5f80903341218c9262eafb9098b7.pdf?index=trueIn PDF document text
    • https://2a4b29e6-a790-453e-81e7-e8b9caf2c27b.filesusr.com/ugd/bf0735_46635d242c5f42948ad8181401df3d06.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7176eef3-abb7-4415-a2f5-9ae6e1170c71/vituvora.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17727356-dc20-4149-942f-ce91af9000f9/civil_engineering_handbook_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/257002ed-5fdb-4528-bba6-60550923bab0/wayne_dalton_9100_garage_door_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53a01ff9-1d64-4b9d-b819-6b282cd8e12d/nobizane.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_off0000e23a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE23A 4616 bytes
SHA-256: 5c68c05218877c21bb26f051c86ffbba9e671dcbe14dcd615b9fe8e883a84084
font_01_sfnt_off0000f214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF214 10644 bytes
SHA-256: 527aa40e7116e235e6f2fd5013b11d0482a78263f2efac99c1e3671c40e7413c

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