Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fd3d36f7f855f69…

MALICIOUS

PDF

87.5 KB Created: 2021-04-14 01:20:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 94509e77cfc96b83f511d200091e971e SHA-1: 7256a2ee707557cc359745d1c6c05962b5570e1e SHA-256: 6fd3d36f7f855f69a85046b3b38b1da93b3aaadab308dd6723d954a7f8fdffff
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9994

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://gimoguvi.ru/strik?utm_term=love+story+andy+williams+lyrics+terjemahan PDF link annotation
    • http://reduslim-buy.site/purple_cow_restaurant_menu3ofor.pdfIn PDF document text
    • http://moitender.org/how_do_you_set_the_time_zone_on_a_lacrosse_clocky5qld.pdfIn PDF document text
    • http://pokemonrivals.online/wupakexezabutrt52n.pdfIn PDF document text
    • http://fepaporipevari.mypressonline.com/8127349543.pdfIn PDF document text
    • https://vipefujalebir.weebly.com/uploads/1/3/4/7/134744486/safuweraju_pusadab_tujesixebimi.pdfIn PDF document text
    • http://maxist.ru/battle_dress_uniform_bduy0dn2.pdfIn PDF document text
    • https://zodixezujiz.weebly.com/uploads/1/3/5/3/135345824/jabevokife_xitawovarob_tekajupudero.pdfIn PDF document text
    • http://kawafopi.mygamesonline.org/how_to_open_a_pet_store_business.pdfIn PDF document text
    • http://medyahanem.com/panegavedobose2wgmz.pdfIn PDF document text
    • http://tibijosetinaj.getenjoyment.net/zasixonaxovules.pdfIn PDF document text
    • https://xalekosud.weebly.com/uploads/1/3/5/3/135350534/8402100.pdfIn PDF document text
    • https://zoxaminajoge.weebly.com/uploads/1/3/1/6/131637873/mejavuderesulepam.pdfIn PDF document text
    • http://italia-doc.fun/pelip4dc11.pdfIn PDF document text
    • https://risegexof.weebly.com/uploads/1/3/4/6/134661868/d29ba15.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/000c0ef3-9bfe-4667-b713-ae10d9feaee0/how_to_clean_out_a_cool_mist_humidifier.pdfIn PDF document text
    • http://gomugugagaf.onlinewebshop.net/tovuxunane.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52125bd4-9c02-4a81-ab3c-dda9735cdab9/wirapovezeruzam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20998b45-3d58-4daf-b2e5-48fb069afc96/76421019487.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e311d27d-4d1c-4b92-ac1d-dbdbcad6efd9/korean_books_for_beginners_to_read.pdfIn PDF document text
    • http://kutoxinupuroxo.onlinewebshop.net/hx_stomp_update_8_blocks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd79f271-8f6e-406b-882f-55598ff2a043/spring_boot_interview_questions_and_answers_for_experienced.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_off0000ef07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF07 6188 bytes
SHA-256: fdb6188f38334b8ad0f87ac459f90568ed35ec8857f1060bd507f39a8d227e02
font_01_sfnt_off0001042f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1042F 5452 bytes
SHA-256: f154d3dd8062a1f325d6ce04c9db1f9fa2273f233678aca9695c9d225e6b9dbb
font_02_sfnt_off000116a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116A2 4812 bytes
SHA-256: 78e7a32a57a6f374cd66f86241944deba436066ae246b9a4d1bec8222282f176
font_03_sfnt_off0001267c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1267C 11596 bytes
SHA-256: 0820c0ca4c5008f7b2af014f0615859c920f90084204914575b17a7463c2fac4

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