Malicious PDF — malware analysis report

Static analysis result for SHA-256 9467422510a520ca…

MALICIOUS

PDF

80.4 KB Created: 2021-09-22 17:15:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 4549f166db316b2ce57d67591e0db2b8 SHA-1: 87b6bfe00daa484d372d6c2b6dea944b9d2eb14f SHA-256: 9467422510a520ca4750a4026a736365d313e755d9b55dbc2af1a248b7bd0ae2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content, likely exploiting them via social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://synerhu.ru/uplcv?utm_term=remove+keyboard+suggestions+android PDF link annotation
    • https://micro-logic.ro/images/uploaded/file/satufewumepawalena.pdfIn PDF document text
    • http://hotelniagararimini.eu/userfiles/files/valajodote.pdfIn PDF document text
    • http://linker-apps.com/files/20764157344.pdfIn PDF document text
    • http://xedaptap.net/userfiles/file/40162207803.pdfIn PDF document text
    • http://capesociety.ca/uploads/files/rijupebunuwula.pdfIn PDF document text
    • https://leosservices.com/userfiles/file/fopofabafil.pdfIn PDF document text
    • http://urparitet.ru/admin/ckfinder/userfiles/files/laresuxajeregefu.pdfIn PDF document text
    • http://xn--aknmedcal-wpbe.com/uploads/file/wexefapofazi.pdfIn PDF document text
    • http://www.ez4parcel.net/upfile/files/2021/09/12/33900559061.pdfIn PDF document text
    • https://poker-fire.de/file/vosiv.pdfIn PDF document text
    • http://damvua.com/damvua/public/images/files/xederu.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161390aad0dc64---dokobezifamebavepob.pdfIn PDF document text
    • https://chandrakantmusicacademy.org/ckfinder/userfiles/files/28417233498.pdfIn PDF document text
    • http://patrick-vallot.com/upload/files/50610534642.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/235bba3f0abb56d81a56a6196f7ad8a6/90545582275.pdfIn PDF document text
    • https://istanajpdua.com/contents/files/52292097457.pdfIn PDF document text
    • https://hondaotohaiphong.vn/upload/files/57517976217.pdfIn PDF document text
    • https://www.thaiahpa.com/flash/files/87178968843.pdfIn PDF document text
    • http://www.libroparlatolions.it/backoffice/ckfinder/userfiles/files/gogubuxuxuluruvapiro.pdfIn PDF document text
    • http://www.azurwelcomeservices.com/userfiles/file/zewaxirugobosutidar.pdfIn PDF document text
    • https://aromamarketing.md/img/files/27781668573.pdfIn PDF document text
    • https://clic-essc.ch/ck/ckfinder/userfiles/files/68169011871.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://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_off0000d2eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2EB 11100 bytes
SHA-256: 9d8d9cd43836bdeda157adfc9fedefd790e509179d12f0554b8b005f1190fd8a
font_01_sfnt_off0000eca5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA5 18344 bytes
SHA-256: cf99ed6978cac4bd17476eb072f50c3e47a2826866439647e756439eb858d534
font_02_sfnt_off00011c32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C32 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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