Malicious PDF — malware analysis report

Static analysis result for SHA-256 da9047f5f8da58a4…

MALICIOUS

PDF

74.9 KB Created: 2021-03-21 00:33:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca8430c85dabd6c1f937c1af517d3e77 SHA-1: d05b48a4a46dc8775d3af0522231a70152edc3e4 SHA-256: da9047f5f8da58a47b8240924df739d87787e06b14c71e1e3946824352a90d06
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which point to other PDF files, suggesting a link farm or redirection mechanism. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of generated links, and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent. The embedded URLs likely serve as entry points for further malicious activity, such as downloading additional malware or redirecting to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/strik?utm_term=latitude+e6410+wifi+driver+windows+7
    • http://latencfsrt.space/18556222556xu54e.pdf
    • http://sellamorem.com/mn_dmv_driver_license_lookupot3fr.pdf
    • https://cdn.sqhk.co/xewafazuk/fFjjige/81962174669.pdf
    • https://cdn.sqhk.co/mugukawi/e9s1Mhf/35538748118.pdf
    • http://boviriso.22web.org/pokikov.pdf
    • https://cdn.sqhk.co/daposofoxig/jgcA1z3/pimejamigofuzeduwexurekib.pdf
    • http://lnstagram-copyright-confirms.com/root_samsung_galaxy_note_10.1_gt-n8000_on_android_4.1.2equg8.pdf
    • http://gojepifega.22web.org/46378364010.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://5090c2af-253d-40c3-bfb7-942fc6db26b0.filesusr.com/ugd/0511f5_2094bfff19344149893efefdd4562b4b.pdf?index=true
    • http://ralemagafi.epizy.com/35966851529.pdf
    • https://uploads.strikinglycdn.com/files/9d801f4c-cbf6-4c7a-885a-f851bc562d03/98890889257.pdf
    • https://49550882-97ce-44db-a38b-6e383bb81149.filesusr.com/ugd/062c90_567e6e52a03d480f82672b1693ef9b27.pdf?index=true
    • https://34e51215-b586-4e01-b3ea-a219475a7b91.filesusr.com/ugd/46481b_8170b1068d7643be819e31c326e6b706.pdf?index=true
    • https://e222b685-7c7f-4cee-b050-218328c89257.filesusr.com/ugd/c0232f_c2a3bd286714447bbdcc6e19bf46b929.pdf?index=true
    • https://e8dc5420-792a-4861-90db-09cfc8d8a7d1.filesusr.com/ugd/1378f5_906e42f80f33454e935e0fdb1a029f26.pdf?index=true
    • https://98748e4b-3258-471a-903e-8ea98415cca0.filesusr.com/ugd/fd7405_8d614551b36f44f89ed1a6ebd015f2a5.pdf?index=true
    • https://uploads.strikinglycdn.com/files/3f8b8315-4f47-467e-8f81-8e2cbfdeab85/schwinn_deluxe_child_carrier.pdf
    • https://uploads.strikinglycdn.com/files/8f9334ca-c8f5-4e9a-b681-21577dece97a/roxav.pdf
    • https://uploads.strikinglycdn.com/files/09fa969f-abea-482d-984b-dae0ff6f63ad/21125846258.pdf
    • https://0a497e50-07dd-462d-832d-d8678f741a8e.filesusr.com/ugd/5f857b_3df8cb87655e4b8ab4420696f96f29aa.pdf?index=true
    • https://3745348a-78a0-42d7-8ff4-af2b45bf5faf.filesusr.com/ugd/02631b_33ee969d37c94e45a074650dd797a869.pdf?index=true
    • 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_off0000e794.bin
5729b8b07fd5bf234a4ba872f3deefe1dfdb2ba8d525dc16cddc4690f78919b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE794 5480 bytes
font_01_sfnt_off0000fa78.bin
7149f6cc474c0a1557f2923764bbdea8a43b08daffbcbd2f5d068104e2032868		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA78 10548 bytes

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