Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d47edf9d5e0c52c…

MALICIOUS

PDF

77.1 KB Created: 2021-03-12 09:57:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: f48e9ac6f5dc723ef4ea8940fdf5219e SHA-1: 22f18a14719e74e43edbc16b5f79e510818b1f86 SHA-256: 9d47edf9d5e0c52c7bbc1161dfe68ed64860a614a39b2d17d5b31f419043eced
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, indicative of a link farm designed to direct users to potentially malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external URIs point towards a malicious document, possibly leveraging embedded JavaScript for redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://lozipotod.ru/123?utm_term=descargar+test+de+raven+completo+pdf PDF link annotation
    • https://cdn.sqhk.co/nugofonavuf/ijhibhh/duel_link_deck_guide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393502/normal_5ff8bc6c57e2a.pdfIn PDF document text
    • https://pafabori.weebly.com/uploads/1/3/5/3/135317136/851416.pdfIn PDF document text
    • http://pinopizo.sportsontheweb.net/vbspu_time_table_2020_ug.pdfIn PDF document text
    • http://mumolazesinidix.getenjoyment.net/vizio_tv_use_bluetooth_headphones.pdfIn PDF document text
    • https://cdn.sqhk.co/butaliwe/bHijwvs/tofukuvo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405899/normal_5fcb21a687463.pdfIn PDF document text
    • https://keduwamiboru.weebly.com/uploads/1/3/4/6/134669925/5a69ca.pdfIn PDF document text
    • https://cdn.sqhk.co/fiwujumejuf/hji9Kgi/xidowimufej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459163/normal_600a4e66ea6fb.pdfIn PDF document text
    • https://wetolobumusu.weebly.com/uploads/1/3/4/5/134579125/vemuguzezotomo_bubumixema.pdfIn PDF document text
    • http://rawoxaxevog.mygamesonline.org/kudivedemaxanomuwaxigej.pdfIn PDF document text
    • https://cdn.sqhk.co/feduvefas/jdzjaQG/racing_underground_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/metexemoraga/RXShjhc/rock_music_videos_in_the_desert.pdfIn PDF document text
    • https://cdn.sqhk.co/zazavoxujub/nNUShiu/74531631246.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491439/normal_602510b8b415d.pdfIn PDF document text
    • https://rogusavonovupe.weebly.com/uploads/1/3/3/9/133997589/145817.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6ddb26ad-aa8e-4a3e-a925-5cef6fc035e1.filesusr.com/ugd/d3d820_a5cda6d7013047baa3f2741d317ee1de.pdf?index=trueIn PDF document text
    • http://bifovigavij.myartsonline.com/vawawikiso.pdfIn PDF document text
    • https://bf130ee1-1463-4c69-9604-1b23772ced92.filesusr.com/ugd/b4609a_adf3f4599fbb47508ed2f0fd99136067.pdf?index=trueIn PDF document text
    • https://c81c1a69-aec6-471c-ac34-7a6800eafc69.filesusr.com/ugd/9ef1ea_cf1b0529e8594d569f430071a574fd80.pdf?index=trueIn PDF document text
    • https://6afed14e-2b01-442b-8c2e-11a8a6f39965.filesusr.com/ugd/46a5ae_9556426283e248488199f813c67c4076.pdf?index=trueIn PDF document text
    • http://vawanumezal.onlinewebshop.net/56452125175.pdfIn PDF document text
    • https://6fd4412c-3e6e-4f21-a9af-8137ffc6c0d9.filesusr.com/ugd/03469c_7220e748c5204fbfbc4bc004f9db9cbd.pdf?index=trueIn 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_off0000efd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD7 5532 bytes
SHA-256: 8e7afd389e5458a3297c1ed0acf1d944d2f60ea484326f148a28e069489f5d93
font_01_sfnt_off000102a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A6 10652 bytes
SHA-256: ecf3bbe702b8726b59518fda69cdca29d3e1abe9dceb2a1f0c623865c7b48067