Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9d81ded8a28d3e1…

MALICIOUS

PDF

78.6 KB Created: 2021-04-19 03:01:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 8525ffa38707063642be1d9cf6802076 SHA-1: 21bb84d2ce354c482d04cc9219e72edba4a4d76e SHA-256: e9d81ded8a28d3e19daa967271a3dc4386bac221ddf95b7c30ed3c63d0ddf932
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm designed to obscure the ultimate destination. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests malicious intent, likely for phishing or malware distribution. The ML classifier and ClamAV detection further confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jumiwimov.ru/strik?utm_term=my+song+elton+john+chords PDF link annotation
    • http://detonic-buy.website/wuguzekababinelovupodauix5h.pdfIn PDF document text
    • http://pressit.fun/kuzesubanimosutugezoweeiq0z.pdfIn PDF document text
    • http://lg-copyrightforms.com/dunatewoxerowopaw4pbgv.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • http://flylovel.com/cabrio_gas_dryer_not_heatingyqe24.pdfIn PDF document text
    • http://winwites.space/bright_dot_in_skyxwinq.pdfIn PDF document text
    • https://dapavivilo.weebly.com/uploads/1/3/4/8/134895477/3680ae45cbcd1b.pdfIn PDF document text
    • https://komijeji.weebly.com/uploads/1/3/1/6/131606126/kokek.pdfIn PDF document text
    • https://keduwiwisa.weebly.com/uploads/1/3/4/4/134486116/zumagite.pdfIn PDF document text
    • http://keksik24.ru/64485027816jrve1.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
    • https://s3.amazonaws.com/kibavutibeved/setajegapemonegeban.pdfIn PDF document text
    • https://8860adff-7f0b-4cf3-a358-cdd560dff136.filesusr.com/ugd/625844_bd1c2d3291d249ae860a9644ad70b84e.pdf?index=trueIn PDF document text
    • http://likifodafiduno.epizy.com/lowebunib.pdfIn PDF document text
    • https://d5bea983-5bca-41ba-aae6-6b688785cc77.filesusr.com/ugd/9ec29b_a6789d8830a44c3b801a6e1bade65cac.pdf?index=trueIn PDF document text
    • http://leranijaw.rf.gd/45966141857.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/60337919456.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/topepofimidemaji.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/how_to_assemble_spalding_54_acrylic_portable_basketball_system.pdfIn PDF document text
    • http://wozaxanakix.epizy.com/fishnet_cycling_shorts_missguided.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/litano.pdfIn PDF document text
    • http://vevuberi.epizy.com/zalosogeliguwagutoximukod.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE968 4916 bytes
SHA-256: bf799d38861c3bba318d97f0a1e04ea62ca5c5fb0bccc95c067b63485263546d
font_01_sfnt_off0000fa2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2D 10836 bytes
SHA-256: 11d4e05fe45646b1b92fd00910e84189e642daded05ef52ca7151c8318fa62d6
font_02_sfnt_off00011f58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F58 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

Open this report in the interactive analyzer, or submit your own file for analysis.