Malicious PDF — malware analysis report

Static analysis result for SHA-256 322c7ca2b5110566…

MALICIOUS

PDF

77.3 KB Created: 2021-03-11 13:41:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef74f8576c1391b7621a7165b4260e85 SHA-1: 94641830c7b4de0f08fe6ce60af179620056aa4e SHA-256: 322c7ca2b511056667b4475e7147208fe4281b073045e6d5d16e129b21905650
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are associated with link farming or phishing lures. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of a URL with a 'utm_term' parameter suggests a tracking mechanism, common in phishing campaigns aiming to direct users to malicious content.

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://soxebez.ru/aws?utm_term=which+waste+product+is+excreted+by+the+kidney
    • http://dorulezebum.sportsontheweb.net/79338677499.pdf
    • http://mumopajikex.mygamesonline.org/54182219469.pdf
    • http://lamejix.scienceontheweb.net/personajes_principales_de_la_celestina_y_su_descripcion.pdf
    • http://sejerodetupumil.medianewsonline.com/dieta_saludable_para_embarazadas.pdf
    • http://lukufogud.getenjoyment.net/pobigupeviferor.pdf
    • http://jusukigib.sportsontheweb.net/baby_groot_and_baby_yoda_christmas_shirt.pdf
    • http://xitawefavam.medianewsonline.com/lixijalax.pdf
    • https://cdn.sqhk.co/dukoredod/IBhfcgh/43562946189.pdf
    • http://vegixojarek.iblogger.org/graphic_designer_resume_template.pdf
    • https://cdn.sqhk.co/kawurefeki/doigVjg/47263154244.pdf
    • http://wikowezenitezo.medianewsonline.com/54008856544.pdf
    • https://cdn.sqhk.co/gefizorabubi/jT4Jjdj/37273306834.pdf
    • https://cdn.sqhk.co/nakunadubux/9iSkmz3/watajuzod.pdf
    • http://zilitimo.getenjoyment.net/sukudedoki.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zoxutuperovizo.epizy.com/venaseposikab.pdf
    • https://s3.amazonaws.com/kitakilesa/40634412259.pdf
    • http://fukuselumetu.myartsonline.com/larousse_french_english_dictionary_free_download_for_pc.pdf
    • http://pavinudoj.epizy.com/zotefuluberagexisisev.pdf
    • http://xekazaz.myartsonline.com/ejemplos_de_dispositivos_de_procesamiento_en_una_computadora.pdf
    • https://s3.amazonaws.com/nemafu/52726391984.pdf
    • http://rirovaxodebola.rf.gd/48143914511.pdf
    • http://matewedidoxeber.onlinewebshop.net/85796459254.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edfa.bin
8465942e8d06b890d66613118915fdad4af48498276a9edbb9552c8947f9f1f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFA 5608 bytes
font_01_sfnt_off00010122.bin
26669fd8669306f4a07050706f238965b2b5cb33b6ca2848e8e25ce39f3e0d96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10122 10736 bytes

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