Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf02d9f3091fa60f…

MALICIOUS

PDF

84.4 KB Created: 2021-03-19 04:48:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 2a3d6c6f4b910aa7a5f13d447e230c05 SHA-1: 07d8b1f97c2a5e0041ce3d51bf8596168738fc3c SHA-256: bf02d9f3091fa60fc3d1947f5abf521f628aea56df6b5d9c58efdaaaab6b511a
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many hosted on disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of external URIs, particularly those with 'utm_term' parameters, points towards an attempt to redirect users to potentially malicious content, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://mezovuduw.ru/strik?utm_term=spyder+python+3.7+tutorial+pdf PDF link annotation
    • https://monopulo.weebly.com/uploads/1/3/5/3/135311873/ninofazuna_pozex_sasobav_xudumolik.pdfIn PDF document text
    • https://tuzatorigipixaz.weebly.com/uploads/1/3/4/3/134321964/fomenum_duresiwumi_dotuguzonivev_pavamatapasarug.pdfIn PDF document text
    • https://cdn.sqhk.co/bodegife/fgcidgc/pewopojipujemabi.pdfIn PDF document text
    • http://vataponuxizeliz.mywebcommunity.org/brahui_language.pdfIn PDF document text
    • http://melowew.scienceontheweb.net/78174127155.pdfIn PDF document text
    • https://wanesibib.weebly.com/uploads/1/3/4/5/134591449/zutagaropapeji-bawobawar-bevizazelib-ketedemi.pdfIn PDF document text
    • https://cdn.sqhk.co/niwexifa/djjJOl3/sijute.pdfIn PDF document text
    • http://civiliscmq.online/bogojijebitopubewarakusudc762u.pdfIn PDF document text
    • https://debosuvulodek.weebly.com/uploads/1/3/1/0/131071041/pagisewa-xodabezud.pdfIn PDF document text
    • http://begemot.space/formas_de_comunicacion_no_verbal_para_niosnbc79.pdfIn PDF document text
    • http://jipegifol.iblogger.org/wafebim.pdfIn PDF document text
    • https://cdn.sqhk.co/nisugavu/kBhgjdR/soul_ev_spy.pdfIn PDF document text
    • http://zivemigidefis.mypressonline.com/20339980064.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wivikisirijuleg.epizy.com/protein_structure_prediction_tools.pdfIn PDF document text
    • http://zomekijisev.rf.gd/amdal_ukl_upl.pdfIn PDF document text
    • http://zugagib.atwebpages.com/40k_orks_codex.pdfIn PDF document text
    • http://pizuzol.onlinewebshop.net/walk_dont_run_tab_bass.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D52 5432 bytes
SHA-256: 84b85f0189259f13b8d352f8a8d0ceb45539baaec8d70a12ba3696ddb1674417
font_01_sfnt_off00011fe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE4 10832 bytes
SHA-256: 46fe04833575543f590ef1d362757117af0e07f3cb7a7edffbe1beeaa36d33f2

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