Malicious PDF — malware analysis report

Static analysis result for SHA-256 d02784cf7f0f7984…

MALICIOUS

PDF

77.0 KB Created: 2021-02-22 17:06:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 8cc3f649eeb6a55b8819bdfd48a39345 SHA-1: a85048cb8b28b0aceeab9c5a32e3bb8f03992ef5 SHA-256: d02784cf7f0f7984528e5f9c199d31f50bd3582ebfa8ce38a7fc4e91266a1b6e
184 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, many of which point to disposable hosting and redirector infrastructure, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the document body's structure and embedded links are designed to lure the user to malicious sites.

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
  • 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.
  • 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://yafferge.ru/123?utm_term=how+to+support+someone+with+auditory+hallucinations In PDF document text
    • https://cdn.sqhk.co/bepemuno/ahcia4c/addons_for_minecraft_pe_website.pdfIn PDF document text
    • https://cdn.sqhk.co/busumodofu/ajg1nX6/document_scanner_app_for_cam_scan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419204/normal_600d6e9bef6c3.pdfIn PDF document text
    • http://letnesil.xyz/60207540781xk3y5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500670/normal_601c630ab2f15.pdfIn PDF document text
    • http://nout-sale.site/nfl_sunday_ticket_2020_pricekg9dt.pdfIn PDF document text
    • https://cdn.sqhk.co/pegatorapo/9GigYjc/denewupo.pdfIn PDF document text
    • http://winfreeiphone.xyz/530974946554f470.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418184/normal_5fd96b3b3cdb7.pdfIn PDF document text
    • https://cdn.sqhk.co/goxobuve/Wggiet4/39173733649.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450721/normal_5fcc379a3e859.pdfIn PDF document text
    • http://construt.site/jaspersoft_report_java_examplerbwqn.pdfIn PDF document text
    • https://cdn.sqhk.co/zotenejek/cichfhh/total_party_kill_dnd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376602/normal_601f2d505a9ab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448548/normal_5fe42818c974a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sofikej.rf.gd/condemn_crossword_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/81822878222.pdfIn PDF document text
    • http://kewivifonawati.epizy.com/radezuxugedijewupib.pdfIn PDF document text
    • http://dubexejevobogi.rf.gd/1499840534.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_off0000f04f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04F 5468 bytes
SHA-256: 877442ed51e348331adb9b015c1f6896fc77f9e2660592459230380930c5d765
font_01_sfnt_off000102cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102CF 10288 bytes
SHA-256: 029f6c60dfe8ce56bbb8e1377b3d9fd4948f3f717929baf71440e07a05a11c07

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