Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ecb4be36f6bf62c…

MALICIOUS

PDF

74.0 KB Created: 2021-06-10 03:59:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 2868a4a17ba9791a3f4effb6cb06c689 SHA-1: 08797aab46c022302b3402f69919fb8d18738778 SHA-256: 3ecb4be36f6bf62c668d26b4044273e597f93898c3a9142f9d95bd043ac6fcd8
194 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm designed for SEO manipulation or malicious redirection. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://irlanc.ru/pbw?utm_term=aashiqui+2+full+movie+download+700mb PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4407301/normal_5fef0c8753475.pdfIn PDF document text
    • https://gopaxabog.weebly.com/uploads/1/3/5/3/135309926/rumirediri.pdfIn PDF document text
    • https://fojomifurinu.weebly.com/uploads/1/3/1/3/131378835/8946055.pdfIn PDF document text
    • https://fumeseteno.weebly.com/uploads/1/3/1/4/131483149/e17680c19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366400/normal_60c12c127b6de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365545/normal_606016bb45e62.pdfIn PDF document text
    • https://lifafogiter.weebly.com/uploads/1/3/4/3/134321186/5712969.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4372719/normal_60afeb3e9948c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421939/normal_5fc80d7275e70.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a264d0b5-95cb-4918-bf14-2e492658b302/the_company_of_wolves_angela_carter_theme.pdfIn PDF document text
    • http://temopifevup.pbworks.com/f/tunilipa.pdfIn PDF document text
    • http://bojifimaral.pbworks.com/f/is_sulphur_hexafluoride_ionic_or_covalent.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7878690-8f83-43d0-b2a1-9409a3b96f38/46599653992.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff7f43ab-79b2-4f21-a2eb-c1ecac8ad55d/how_to_cancel_ei_report_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26382eb7-5540-457b-9b8b-a318e1ef8cc0/48701200391.pdfIn PDF document text
    • http://lopofemusun.pbworks.com/w/file/fetch/144502074/minecraft_free_download_apk_softonic_pc.pdfIn PDF document text
    • http://banusiv.pbworks.com/f/madedu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7235de12-af83-4fa6-8e58-f78e878c66d0/70422983630.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ed416ca-9635-4f26-b761-0e2707640f10/words_that_start_with_diss.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/668d434d-65c0-4690-b88e-da4797ca4a41/comentario_biblico_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61df1113-2fe9-4f62-b23c-c004fcae0e8a/reloparev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50ac22ce-b04c-4095-ad84-0e089ee39692/fender_audio_passport_event_s2_portable_pa_system.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d34e8e3-c8f4-4f0e-b5e7-cf7a335559e9/rezetenexesidimakidowimi.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_off0000e3a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A3 5812 bytes
SHA-256: ea06ef041ca8e06facfd1a7f6b66f0ef9a543300d47b6acc3b8176d7483c7379
font_01_sfnt_off0000f75e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF75E 10340 bytes
SHA-256: da6d3d16eb7bb6f448cf053c850d44896d224bead7697aebcb50214b6e275447