Malicious PDF — malware analysis report

Static analysis result for SHA-256 164a8be2ad68514a…

MALICIOUS

PDF

73.8 KB Created: 2021-02-25 08:51:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3b9c1588d441d658dd4ab1924c5d2bc9 SHA-1: 9238ad57c757ff646d7fd7f2a6d86a2584a8f320 SHA-256: 164a8be2ad68514ab91606c96ce084ebb540fb7e3680e5884ce0fde1242bd266
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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
  • 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://jottigo.ru/wix?keyword=practical+paleo+pdf PDF link annotation
    • https://zifokodogip.weebly.com/uploads/1/3/1/3/131398222/6434496.pdfIn PDF document text
    • http://lololoj.sportsontheweb.net/hp_photosmart_d110_printer_wont_print.pdfIn PDF document text
    • https://cdn.sqhk.co/lebexuzo/V2gjXid/nhl_news_and_rumors_flyers.pdfIn PDF document text
    • http://tehnotop.site/41162493031e3g6l.pdfIn PDF document text
    • http://nageramuvepom.mywebcommunity.org/40484567648.pdfIn PDF document text
    • https://sidonakitipu.weebly.com/uploads/1/3/4/6/134631457/bovakuwiterexaba.pdfIn PDF document text
    • https://togajakuro.weebly.com/uploads/1/3/1/4/131409127/232784.pdfIn PDF document text
    • http://xufamorazogubov.sportsontheweb.net/palo_mayombe_books_english.pdfIn PDF document text
    • https://cdn.sqhk.co/vixonafom/hEigE8r/duvajufitixo.pdfIn PDF document text
    • http://mscgis.net/mulibudokoleb8kvck.pdfIn PDF document text
    • https://cdn.sqhk.co/fasisela/gigh2hg/free_tamil_movies_app_apk.pdfIn PDF document text
    • https://lobobofu.weebly.com/uploads/1/3/4/6/134680821/jiteputevakep.pdfIn PDF document text
    • https://mamowolo.weebly.com/uploads/1/3/4/7/134714390/siput-foruwogix.pdfIn PDF document text
    • https://cdn.sqhk.co/xavaxonad/7ifhi38/kung_fu_tea_menu_no_caffeine.pdfIn PDF document text
    • https://tadonajates.weebly.com/uploads/1/3/4/3/134319020/3555973.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://nejesezape.myartsonline.com/how_to_reset_bluetooth_earbuds.pdfIn PDF document text
    • http://xolavozezimodan.onlinewebshop.net/libros_de_louisa_may_alcott_en_espaol.pdfIn PDF document text
    • http://bumurulepowele.myartsonline.com/75688700724.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8EF 4656 bytes
SHA-256: 14dcbb3d342977bb3ac8a28ebe463e9e42632a66bff5204fdc88598a213d141c
font_01_sfnt_off0000e8c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C8 10444 bytes
SHA-256: be66d897cd411f92e040cacd1142a266c4f31ece5e1810c4d5dc05e42aadb4f5
font_02_sfnt_off00010c20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C20 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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