Malicious PDF — malware analysis report

Static analysis result for SHA-256 6347b4b9423f6fd6…

MALICIOUS

PDF

68.8 KB Created: 2020-12-02 18:17:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c91eb234746db9e19597e59941366ab9 SHA-1: b01378bb1d05c3861c286cdf6b596989921e8e57 SHA-256: 6347b4b9423f6fd647a57e0aa6a1383358447cfe11a8367de94288c6c50d87f2
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one pointing to 'traffset.ru', a domain associated with malicious activity. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links 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 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.
  • 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://traffset.ru/aws?utm_term=calendar+2018+ramadan PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403531/normal_5f91c8a39ea43.pdfIn PDF document text
    • https://mumixopid.weebly.com/uploads/1/3/1/8/131872042/9752403.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389792/normal_5f9ea8a76f6b9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0dda31452f90b7fe53205/t/5fc113824e98326c02366960/1606488963638/3_gallon_aquarium_stand.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0028ac14dfd36feec75cc/t/5fc14b2b3c02f22b9d3cc2b5/1606503213679/93794668071.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc53e37e5c7695ca9b80b18/t/5fc7b553ad3e641192501395/1606923605690/lologesojaz.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/impact_of_green_revolution_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/arundhati_bengali_movie_3gp.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5355c24b06a7eb31bb18b/t/5fc69792145a8629dc98cce2/1606850451759/jokutexitinekurovofagodo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4dabec6d96458363b5a9a/t/5fc52a313f75b166437a1ad0/1606756915134/showbox_app_apk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfd56316f6d44b07b8b81c/t/5fc691fb3f75b16643ba02aa/1606849020133/zetopogujopasobobodu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc294d0bda9c57a97c8e281/t/5fc3fcd6bc819f1cf4549260/1606679767871/introduction_to_heat_transfer.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf68fb3c6ccf69f356c760/1606379775613/james_baldwin_sonnys_blues_amazon.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/gexawigebuxetelezab.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/32150886612.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0052111f6a4198480c96b/t/5fc0f2174f9837572001d835/1606480409298/when_it_changed_summary.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_off0000d19f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD19F 5220 bytes
SHA-256: 554055f13b391a0aa040dde724d2562bb022107515a1fdc7d4e33a42696b05e4
font_01_sfnt_off0000e33e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE33E 10192 bytes
SHA-256: daa5d0e238152abc36c95a5430316e959a64946b654ea224b6dc2edbe7843c08

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