Malicious PDF — malware analysis report

Static analysis result for SHA-256 44b797123ca54082…

MALICIOUS

PDF

95.0 KB Created: 2021-04-23 18:22:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 64043086d25f7e6338815bc09a10d8ff SHA-1: 053bdadbb8437c88f24486750a56ab14f2bd2872 SHA-256: 44b797123ca54082ce5be73f752cd0cfd6a4d99de992cb379aa97359d2e718a0
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and one specifically uses a 'utm_term' parameter suggesting a phishing or tracking lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8870

Heuristics 4

  • 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
  • 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://midufefew.ru/strik?utm_term=binding+of+isaac+game+monsters
    • http://ferategaj.scienceontheweb.net/answers_to_behavioral_interview_questions.pdf
    • http://thrivewebs.com/fekowopunezirofeuo8.pdf
    • http://lujoxowuri.iblogger.org/gajefinazupefideluko.pdf
    • http://electriccannoz.club/vewakazuxos5gf4h.pdf
    • http://wezoweno.22web.org/3143442283.pdf
    • http://noxaduva.mypressonline.com/ahsanul_qawaid_free_download.pdf
    • http://meleworofazob.22web.org/xolalep.pdf
    • http://netewe5.xyz/gexodazemupaw6ywke.pdf
    • http://it50save.info/9149257291081gu3.pdf
    • http://stopro.store/72596952287iuebd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://ce419959-236d-4487-89d7-67f356bda573.filesusr.com/ugd/147b51_1531eb3b40044a749ada0ff00c636443.pdf?index=true
    • http://xalovizavana.rf.gd/ziwodanodewaregibefelile.pdf
    • https://9a60fab3-6fb0-4be7-9305-b2e3cc44d963.filesusr.com/ugd/811c4f_dfa22bc59025454ebae3d7b16721235c.pdf?index=true
    • https://ce3a146a-d504-4efb-981c-4593fb85d965.filesusr.com/ugd/5b5da7_da0b024bb52b489ead63cee50a2f578a.pdf?index=true
    • http://vugovule.epizy.com/94335949981.pdf
    • https://11ab4cf5-156d-4417-99e9-5039b2a7eb5f.filesusr.com/ugd/82d61e_13615667e4ae48a794757ecee7f5260c.pdf?index=true
    • http://tunajuxogililog.epizy.com/informante_minero_convocatoria.pdf
    • https://ef4b221f-cfb4-47e8-bf1d-3b5092770df7.filesusr.com/ugd/4948da_49b97ad451324af0933b9d5b1b30940c.pdf?index=true
    • http://susabumo.atwebpages.com/47280857440.pdf
    • http://vimitafukufes.rf.gd/baal_badhane_ke_liye_video.pdf
    • https://0115c081-d8bc-4983-a705-81db93bf1442.filesusr.com/ugd/990402_2ee134ee066344fcb04bc3938d9f3dcb.pdf?index=true
    • http://luzawuwu.epizy.com/18093708666.pdf
    • https://d2d87fd5-5f4d-49aa-ab3c-2263ce4b5d22.filesusr.com/ugd/9169d2_dc9ce01fd91f40e7b6e521f16ce5634e.pdf?index=true
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015980.bin
501118a83108552f697ed86b592e76e7836af00a5b05dc7c614b947d13d0064c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15980 5360 bytes

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