Malicious PDF — malware analysis report

Static analysis result for SHA-256 c72216306210ec60…

MALICIOUS

PDF

78.1 KB Created: 2021-03-09 09:32:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed714df16867612f55120652dcb33d7e SHA-1: 18e2712722866b27428b44d71e120619fdaf27ca SHA-256: c72216306210ec604d844b43424536391b7110f3e3d3395899757de2132ef8a7
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one specifically pointing to 'https://botokaw.ru/123?utm_term=business+card+icon+png', suggesting a lure to a malicious website. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, many of which are likely part of a link farm designed to attract traffic or distribute malware. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature.

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://botokaw.ru/123?utm_term=business+card+icon+png
    • https://static.s123-cdn-static.com/uploads/4459482/normal_5fcba4b814be1.pdf
    • https://static.s123-cdn-static.com/uploads/4417309/normal_5fe18d37c7432.pdf
    • https://cdn-cms.f-static.net/uploads/4444649/normal_602740cf60e9e.pdf
    • https://static.s123-cdn-static.com/uploads/4501208/normal_5fcc4115262e7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0c6d7e9f-8ef3-464c-820d-a911aa6dfc28/15634702327.pdf
    • https://36425c1f-c329-48aa-845d-1f8252cb45c8.filesusr.com/ugd/01d500_d66dfcab6e99402ab810a816606a203c.pdf?index=true
    • https://71e5fc8e-cc9a-4633-96c3-2c70acd464d0.filesusr.com/ugd/f08e01_d4ab11257ba84fc68eadc167de21ad6d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/1ab022cc-a12e-4794-a884-59425ca75ec8/is_nintendo_still_making_wii.pdf
    • https://6f8cb219-4830-455d-9ced-b55e65700e85.filesusr.com/ugd/fd30ac_ff0914d6dd8d4db7b2566a1c7a8c3345.pdf?index=true
    • https://cae2aa39-5014-47ec-b549-0fed73f36d02.filesusr.com/ugd/c8683e_c2339aef55f8498e9abf7d831f1c41b9.pdf?index=true
    • https://uploads.strikinglycdn.com/files/cb48d961-08ba-485b-9d3f-c53aef3a01da/drawing_classes_for_adults_in_kolkata.pdf
    • https://uploads.strikinglycdn.com/files/743af744-ad15-479d-aff6-6401e1da2d9d/why_is_it_called_a_gimp_suit.pdf
    • https://uploads.strikinglycdn.com/files/a33c4332-236a-4639-b871-3c0ac28718d0/93170743241.pdf
    • https://s3.amazonaws.com/wakuzidi/89226962855.pdf
    • https://s3.amazonaws.com/jeduzizonox/is_forex_still_profitable_2020.pdf
    • https://uploads.strikinglycdn.com/files/62cdc676-7c4d-460f-a38d-0ba05f68ddac/how_to_update_arris_sb6183_firmware.pdf
    • https://uploads.strikinglycdn.com/files/c4a5a4da-ec7f-419f-94f3-a34a5dc9c7ea/bose_companion_3_vs_5_comparison.pdf
    • https://uploads.strikinglycdn.com/files/13e7c22f-1d54-42fd-882a-303f973e177f/vejarodifubageteduxopor.pdf
    • https://uploads.strikinglycdn.com/files/cdd6d339-4860-4abb-81ac-eb2da6819619/international_journal_of_applied_business_and_economic_research_impact_factor.pdf
    • https://s3.amazonaws.com/mipeboro/garfield_comics.pdf
    • https://uploads.strikinglycdn.com/files/dfeca578-70b5-4f3c-998a-49233a9a849e/breville_toaster_oven_door_repair.pdf
    • https://9005a25f-7293-4a73-bb0f-bc58e8c16807.filesusr.com/ugd/e3834b_cea2a36cb3764c2bba5220f89d13659f.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_off0000f5d9.bin
5bc671fe1f8e52287044d96a5ebb25c8dbde8c13423484f5783504c4561769cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D9 5256 bytes
font_01_sfnt_off000107cd.bin
a5b8a00ffd63f866694cbb1980b9cd5faf841ef807a085fb7364eba9ba4c6075		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107CD 10420 bytes

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