Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9d8a7a39b1d4113…

MALICIOUS

PDF

67.6 KB Created: 2021-02-02 17:32:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 33fe01b4a40b28badd82906304e8ef70 SHA-1: f8604228306dd3a3fb47e1d3748afc510be54aac SHA-256: f9d8a7a39b1d4113cadb26afcab42fb412eac31c62b1ca2d30e338aa458ccf9f
182 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, and the presence of embedded URLs indicates an attempt to direct users to potentially harmful external sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8294

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/aws?utm_term=best+workout+tracking+app+android In PDF document text
    • http://lunesygets.xyz/lego_star_wars_tfa_red_brick_codesd82jw.pdfIn PDF document text
    • https://rarejiwu.weebly.com/uploads/1/3/1/6/131606055/bijareremepoli_vigavejesewep_wukat.pdfIn PDF document text
    • https://fupelesanu.weebly.com/uploads/1/3/1/6/131606305/43a2bc50ab3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404103/normal_5fe2f688d547e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463559/normal_5fe6fdcd412ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378620/normal_60161b3921157.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366398/normal_600a67362ac92.pdfIn PDF document text
    • https://cdn.sqhk.co/timadupak/gpDVluJ/directv_customer_service_telephone_number.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390052/normal_5fe2eb0d31610.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwopazeg/haNbK4W/nc_teacher_assistant_pay_scale_2019-_20.pdfIn PDF document text
    • https://cdn.sqhk.co/papazokixe/akJ1djj/90314108755.pdfIn PDF document text
    • http://fbcopyright-center.com/shooting_targets_for_sale_australiau194c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482405/normal_5fd1df4ebef5a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453550/normal_5fef6c7b7bf6b.pdfIn PDF document text
    • http://lamovingcompany.com/scene_definition_literatureyrot1.pdfIn PDF document text
    • http://afracheat7.xyz/fejovilurupy7sjp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476148/normal_5fd3071974812.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/legends_of_runeterra_guide_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/connect_4_addition_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/casual_leave_form_central_government.pdfIn 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_off0000f325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF325 5412 bytes
SHA-256: 18ad6b9b535d8625aafa5dfe158dc5d71befd73b71f8532fc10db5b8e154992d

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