Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf29fe7af795d395…

MALICIOUS

PDF

75.2 KB Created: 2021-03-18 09:19:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 0f7218d1d6b35fc8a4c161ebc2787ab3 SHA-1: 78d9ab5f1537971644268fd0411f80b874e942b5 SHA-256: cf29fe7af795d395585b0b8c4cedad599bb5537b54e1da3e0c03a39eb3dced44
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a URL that mimics a search result, likely to trick users into visiting a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a potentially harmful external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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
  • 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://mezovuduw.ru/wix?keyword=five+nights+at+freddy%2527s+hacked+on+scratch PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387826/normal_602ce81e8b742.pdfIn PDF document text
    • http://bifitiguz.iblogger.org/42956894296.pdfIn PDF document text
    • http://drilltech.info/87847226553la6jv.pdfIn PDF document text
    • http://xunajoza.22web.org/pefigibovolago.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463809/normal_5fd9446da2932.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402960/normal_5fe60bb3dea0a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484103/normal_6003b46447f86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376404/normal_601ef6a7377cc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366336/normal_5ff239d97698b.pdfIn PDF document text
    • http://lishop.site/genetic_testing_pptshmtf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444856/normal_604af2dbee9aa.pdfIn PDF document text
    • http://goodnatural.space/what_can_a_pimp_be_charged_withqe95k.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/88f28800-2fd4-4476-8ee0-28525b90997a/nupufusol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46c1a21c-3dda-4ad1-be49-0ea857a6b6b9/60635329224.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/card_sheet_art_work.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/lively_letters_coloring_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/bluedio_t6_manual.pdfIn PDF document text
    • http://fudisufawapopab.epizy.com/neduzugovuwebijiwepuzef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bbb0bdc-2e83-404c-be50-55ccc11c0818/how_to_clean_st_croix_pellet_stove.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b3ef7cc-5cb9-4964-9314-d24a7dcfd0ad/hp_designjet_500_driver_windows_8_64_bit_download.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/metabolismo_de_carbohidratos_proteinas_y_lipidos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97f4de48-d438-4266-b8b2-a7c53164fbf6/madden_16_trophy_guide.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_off0000e764.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE764 5468 bytes
SHA-256: de14198db1c9406feee18b12fc19b408e5cab4f34205cd8a52da0a1fc580c56d
font_01_sfnt_off0000fa17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA17 10892 bytes
SHA-256: fbb0ece37b2e9bd351012cc68852a69b327a0e74649324925f89c78024da2edf

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