Malicious PDF — malware analysis report

Static analysis result for SHA-256 34b5464afb1f7ddc…

MALICIOUS

PDF

82.0 KB Created: 2021-03-23 18:35:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: a3b62517df9a83f575d8762e5311f87b SHA-1: 60f5c04fbd391610225268470a0ba7d5c6deeb70 SHA-256: 34b5464afb1f7ddc43abf1e44db394129b0e7390f09806957d724f6c89851d25
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 hosting, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to harmful 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://midufefew.ru/award?keyword=what+is+bilingualism+and+multilingualism+pdf PDF link annotation
    • http://ranebixulukaku.iblogger.org/sewofi.pdfIn PDF document text
    • https://cdn.sqhk.co/rawuredilu/djeiafd/best_link_er_for_android.pdfIn PDF document text
    • http://okrasote.info/oraciones_subordinadas_resueltas_primero_bachilleratobijhj.pdfIn PDF document text
    • http://lerimofo.mywebcommunity.org/pexafosaf.pdfIn PDF document text
    • http://abzac.me/your_choice_restaurant_menuw7ht8.pdfIn PDF document text
    • https://cdn.sqhk.co/sevijeruba/iagdX5E/jazuxakoxupomewinebufeza.pdfIn PDF document text
    • http://midixub.iblogger.org/aayegi_aayegi_ringtone.pdfIn PDF document text
    • https://likuwiwekadu.weebly.com/uploads/1/3/1/8/131857000/rorapejurin-dolevadufit-sujelevijot-jazavemebenage.pdfIn PDF document text
    • http://netewe9.xyz/15660675639hzoex.pdfIn PDF document text
    • https://cdn.sqhk.co/pinofizulag/gVwidGJ/35904765282.pdfIn PDF document text
    • https://cdn.sqhk.co/puwukuwos/heFidIP/network_marketing_success.pdfIn PDF document text
    • http://gufurebu.medianewsonline.com/how_to_sketch_a_graph_of_a_function.pdfIn PDF document text
    • http://sowopezamiw.medianewsonline.com/rulifadonofurabakodosez.pdfIn PDF document text
    • https://ganepivojo.weebly.com/uploads/1/3/4/7/134774155/bejogoliwi_jidofozo.pdfIn PDF document text
    • http://birjand.design/33772586299lwogm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jesogini.rf.gd/kipojikireki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b85d5a1e-ef16-40dc-bc3c-01d2733c0b74/25033550911.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1509fe77-e4b1-49e8-99f9-8d2173b2d64a/xivekitugo.pdfIn PDF document text
    • http://sitejaxikezo.epizy.com/chabot_college_assessment_test_study_guide.pdfIn PDF document text
    • http://vunatilun.epizy.com/adobe_illustrator_2017_free_trial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e0ef658-c5b9-4eb6-838e-ee42fcce0be2/tipo_de_comunicacion_escrita.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_off0000ecdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDD 5512 bytes
SHA-256: 81cf9c402ec921a51f2788deb3b6453ac249f3737da2000fec46bcc23d319bb7
font_01_sfnt_off0000ff83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF83 10544 bytes
SHA-256: f737d967f568b3ad77e17f72a1cec3d57610ee9e68e69b4cbe06a871d5ca1125
font_02_sfnt_off000123e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123E8 16060 bytes
SHA-256: 4ef9506ee11a349461550e6b437e3786686b598308a87786035880d16624999d

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