Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f60362924557ceb…

MALICIOUS

PDF

74.0 KB Created: 2021-05-11 23:34:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 10ab9b85bbcc43c4c8781c8bad64b4c7 SHA-1: 52c7141b7b2d8953bf9808b1093ec7c3717a5142 SHA-256: 5f60362924557cebe3c1e34ebd9159834ecba2bdfdab56678fe56fef81163cb3
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://fokemale.ru/strik?utm_term=how+to+scale+up+your+career PDF link annotation
    • https://cdn.sqhk.co/xunalafugapa/jjfihjg/xiwasobedomutidu.pdfIn PDF document text
    • http://jukejed.mypressonline.com/ejercicios_futbol_7_alevines.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465386/normal_5ff072816ba4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448536/normal_6032c56be1905.pdfIn PDF document text
    • https://cdn.sqhk.co/nuduniguwufo/GihRrgi/80602939563.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468296/normal_5fd2853eb5690.pdfIn PDF document text
    • http://javosewo.sportsontheweb.net/liwopokijobapifebevebo.pdfIn PDF document text
    • https://cdn.sqhk.co/rajunakeb/bZogijj/34813084077.pdfIn PDF document text
    • https://cdn.sqhk.co/tijaxasazuwi/cenKhcg/85844952306.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cb47f074-0476-4434-b381-5672a365cab8.filesusr.com/ugd/c46c8a_db9ae185a29e4fc38bc0b1d9d5c6e2a6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb465496-ffaf-4da9-824f-13561a4be4ff/fizavowezif.pdfIn PDF document text
    • https://e3c65705-3664-417e-97b1-2ac29bfab8bd.filesusr.com/ugd/6a5da5_6cd4b7b8f2c54b2fbfcd4b64b9323e19.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f7fa101-7fad-40b1-8aff-a3c006e82ef5/toyota_corolla_xli_2009_for_sale_in_lahore_pakwheels.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1d37a87-473c-412d-a3b9-3841803d5752/survival_movies_netflix_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/967f0b68-f73d-4963-adf8-77918f3f3610/how_to_crop_video_in_premiere_elements.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93203835-7272-4b2b-bf98-518788048125/how_to_change_point_slope_to_slope_intercept_form_with_fractions.pdfIn PDF document text
    • https://033a7475-7ccb-45c1-8f1e-38fd320d48d0.filesusr.com/ugd/03a576_238e0cbd598a413295c5f59190c9779c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f41040bb-e191-4e3a-855c-412d94341e64/how_to_delete_onenote_class_notebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc8c53f9-9e00-470a-8991-b62b3ac92d4f/cyberpunk_2077_ps5_pricerunner.pdfIn PDF document text
    • https://54fa3baf-6954-44a2-98df-2137f0cc340f.filesusr.com/ugd/14b79e_46f4f6729d214b759e73d33498e9bbf2.pdf?index=trueIn PDF document text
    • http://nabafutig.myartsonline.com/xalixobanukosolunuwexupif.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_off0000e683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE683 5084 bytes
SHA-256: 09ee624324e05d234a8b3038d53f86a4b142f881eac3be7b237bb24bf4a90020
font_01_sfnt_off0000f7f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F5 10188 bytes
SHA-256: fc661f553ebc251350a81be86b473ef181c85319a9a12b5454283c7fb3250a44