Malicious PDF — malware analysis report

Static analysis result for SHA-256 8662f76bdd8f94c1…

MALICIOUS

PDF

72.0 KB Created: 2021-03-12 02:30:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 0244b6fe49f3151f5237072bcccc4457 SHA-1: dbe00afbed7a5058c5963881284a49a5b5c4b0e3 SHA-256: 8662f76bdd8f94c1f66fa963befa511138fd48a1249d88431ba3b61e6d9ec020
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL pointing to a site offering a 'free download' related to landscape architecture. Heuristics indicate this PDF is part of a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver a malicious payload or redirect to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9618

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://pelibifir.ru/award?keyword=form+and+fabric+in+landscape+architecture+pdf+free+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4388819/normal_5fdfd708bdbeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377095/normal_6028fadd542dc.pdfIn PDF document text
    • http://wonder-ita.space/778104900955ajdx.pdfIn PDF document text
    • http://mixixokixa.22web.org/how_long_do_you_cook_a_half_ham_in_the_oven.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427783/normal_6017c8dc244e8.pdfIn PDF document text
    • http://espaceabonne.com/guild_fest_lords_mobile_guideiqc8j.pdfIn PDF document text
    • https://cdn.sqhk.co/mifodirula/ihWzPjc/dragon_bubble_tea_menu.pdfIn PDF document text
    • http://my-favshope.online/how_to_write_a_literature_review_ukhiz3e.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxumisi/dPjbc5O/ionic_and_covalent_bonds_practice_worksheet.pdfIn PDF document text
    • http://wawupamol.iblogger.org/ap_calculus_bc_free_response_2013_answers.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/9c94d81e-8e13-4a69-86ec-9ae2799e95c9/judith_butler_gender_trouble_cite.pdfIn PDF document text
    • https://26aaa629-0581-4e25-ae32-a194504e59ab.filesusr.com/ugd/2d4e87_9bcbe564ec854e82b7719d76e05a415e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/99cf15a6-337e-4e75-aea9-2f9380f43391/37380469776.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e963ecbf-d517-45d4-8ab9-5760d6e9a9b1/define_the_three_types_of_plate_boundaries._how_do_they_move.pdfIn PDF document text
    • https://29aa9d28-cc9d-45fc-8d86-3718b5881c84.filesusr.com/ugd/74c34a_b7bfae42a37c4d058e6877789cb88f0b.pdf?index=trueIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A0 5584 bytes
SHA-256: d6fa7407cc6f3fcb9e5b6893e13d8dc913a6039ead9cb0588d828daa883da293