Malicious PDF — malware analysis report

Static analysis result for SHA-256 883b25e6801b21ef…

MALICIOUS

PDF

102.0 KB Created: 2021-04-22 13:28:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 879cc0a25a649a35ea282c1222864543 SHA-1: 758d0d03e5e7031a9be5fc261f8bc7f1efeac19f SHA-256: 883b25e6801b21ef6b7c1a5e4704fdeda2d194f845fad2daeea03378b6c94d6c
126 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to deliver a payload or phish for information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://dugedepap.ru/strik?utm_term=what+is+the+strongest+intermolecular+force+in+t-butyl+alcohol PDF link annotation
    • http://jepewadagamer.scienceontheweb.net/digital_free_trade_zone_malaysia.pdfIn PDF document text
    • https://tujurexi.weebly.com/uploads/1/3/4/7/134743655/3859644.pdfIn PDF document text
    • https://kefuluseze.weebly.com/uploads/1/3/1/3/131398598/junon.pdfIn PDF document text
    • https://nazorokofewedu.weebly.com/uploads/1/3/2/7/132710677/3849f3c95e.pdfIn PDF document text
    • http://mowefopovog.mywebcommunity.org/audio-technica_at-lp60xbt_bluetooth_fully_automatic_stereo_turntable.pdfIn PDF document text
    • http://lexamopelezun.mywebcommunity.org/adobe_premiere_pro_price_in_india.pdfIn PDF document text
    • https://vigenawora.weebly.com/uploads/1/3/4/4/134495248/dazuxodibi-zawubutis-jigav-gobin.pdfIn PDF document text
    • http://palikexifumalam.mywebcommunity.org/vadixibojob.pdfIn PDF document text
    • http://ramedefinu.getenjoyment.net/rukimolorosewegovoras.pdfIn PDF document text
    • https://xifugewelude.weebly.com/uploads/1/3/4/3/134353264/seruvojosiz-gorufubojomo.pdfIn PDF document text
    • http://baxijemapuzoxu.22web.org/best_answers_for_interview_questions_for_freshers.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/6e269f90-cf1c-42ad-a48c-0cff0b5be0a4/28686784868.pdfIn PDF document text
    • http://lejaget.epizy.com/44645330752.pdfIn PDF document text
    • http://madigekole.onlinewebshop.net/fawinoruxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71cfec32-81f2-4139-a64e-570538bacbf2/how_much_does_it_cost_to_service_a_lawn_mower_uk.pdfIn PDF document text
    • http://linuxuxotarife.rf.gd/wonexifo.pdfIn PDF document text
    • http://xavujoz.rf.gd/robotics_engineering_download.pdfIn PDF document text
    • http://rarefovukafulu.rf.gd/osrs_kalphite_queen_slayer_guide.pdfIn PDF document text
    • http://nozuwodapa.epizy.com/nicotine_replacement_therapy_guidelines_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/590017f7-d03c-4d04-be72-bdbc346c7b94/is_f_test_always_one_tailed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edf8a6db-0cb5-4e59-a302-a6234aae7e14/65383699851.pdfIn PDF document text
    • http://lusujukelod.epizy.com/exam_cram_security_review.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13920 5584 bytes
SHA-256: d9843d39c6ae597b833c825d66a1d61bdfc04778b276389ec6429aa90ba4d049
font_01_sfnt_off00014c15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C15 11624 bytes
SHA-256: 7b01a9ec28fe04ca3faa9549a747522e2b2d131eb5fc3ddfdcb43cc4c6929b8e
font_02_sfnt_off00017416.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17416 16084 bytes
SHA-256: 0ebed3a45db30c623f43e4ea95d967cd733a3183813c05a530f69621d31af6a9