Malicious PDF — malware analysis report

Static analysis result for SHA-256 e06fdf1cdafdde6b…

MALICIOUS

PDF

83.2 KB Created: 2021-03-14 01:25:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: f66a088a75c9be072e8cc65153dc04fd SHA-1: 145e838996f7c728be8329f71fd82c801ad82748 SHA-256: e06fdf1cdafdde6bc00c04546def551738c070ca6edee95079c359627ad37a8b
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, many of which are part of a link farm on disposable hosting, suggesting an attempt to redirect users to malicious sites. The presence of a 'download button' heuristic further supports the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://nipisod.ru/123?utm_term=opera+browser+apk+new+version PDF link annotation
    • http://xorimomupajo.scienceontheweb.net/76865156269.pdfIn PDF document text
    • http://borejukeluteva.mygamesonline.org/tekiji.pdfIn PDF document text
    • http://motubudasuvapan.medianewsonline.com/raymarine_c120_manual_download.pdfIn PDF document text
    • https://nizuwutino.weebly.com/uploads/1/3/1/4/131482859/f6ce6e21caa4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416149/normal_5fd9c488b8ba5.pdfIn PDF document text
    • http://mawosatejojeka.sportsontheweb.net/28206817160.pdfIn PDF document text
    • https://zuwadakake.weebly.com/uploads/1/3/4/6/134664894/fdbf125.pdfIn PDF document text
    • https://fukorolavo.weebly.com/uploads/1/3/4/6/134639224/6436765.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488570/normal_5fe2596b81fd7.pdfIn PDF document text
    • http://interstart.online/administrao_geral_e_pblica_2018gpbb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373788/normal_6022bf7dd2810.pdfIn PDF document text
    • http://keksik24.ru/4520575726kqilw.pdfIn PDF document text
    • http://lifelalulenomip.mygamesonline.org/vergiftete_kindheit.pdfIn PDF document text
    • http://torchland.xyz/90054701087gho7.pdfIn PDF document text
    • https://pegupirorig.weebly.com/uploads/1/3/1/4/131406852/50c156c509296.pdfIn PDF document text
    • http://mivifukatovaga.getenjoyment.net/gejopivene.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426571/normal_6041ab63d6cbd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478137/normal_60154631c1a6a.pdfIn PDF document text
    • https://rudanivaxaf.weebly.com/uploads/1/3/4/4/134497940/bulivasatatilax-gikebavux-mimovorakeb-kawanu.pdfIn PDF document text
    • http://meetplafond.xyz/how_to_work_on_critical_thinking_skillskxxsk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479460/normal_5fe55f88a42f5.pdfIn PDF document text
    • http://melomone.scienceontheweb.net/kjv_bible_apocrypha.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405195/normal_5fea365ae6f95.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378390/normal_5ffbfd8e17f89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489609/normal_6046cdde013e3.pdfIn PDF document text
    • http://vehicleinsusa.com/what_does_a_houseman_do_in_a_hotel3ntu8.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://benamow.myartsonline.com/what_penny_stock_to_buy_now.pdfIn PDF document text
    • http://kakasis.onlinewebshop.net/electrolux_vacuum_repair_shop_near_me.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5B 4872 bytes
SHA-256: fe2b3850419b0f397f7eca18c24c0fc4cb74466d98361daa68bf756dda337ed6
font_01_sfnt_off0000faec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEC 3940 bytes
SHA-256: e88311ea2d2e68ee10f90806ba21c029d275378842919fbff6bb51cd3c355886
font_02_sfnt_off0001099e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1099E 10784 bytes
SHA-256: f9948e5c0a79b3c3f45ce9b1127d2e86b9f7e0002afdfc4fb17e01dfaa78449d
font_03_sfnt_off00012eae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EAE 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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