Malicious PDF — malware analysis report

Static analysis result for SHA-256 8aeea58d677cdadb…

MALICIOUS

PDF

78.7 KB Created: 2021-09-19 02:08:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 31eb111728e9501988fdd95c363b0ed2 SHA-1: 47e7fc8899eb855c839b76fab591534b511701ec SHA-256: 8aeea58d677cdadbf4405ad390f2242cd70e04936169225c7d7e6b46ca5f8078
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of numerous embedded URLs, many pointing to disposable domains and forming a link farm, suggests a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://wegofa.com/userfiles/file/feruxisasikikeravedevi.pdf In PDF document text
    • https://ihappywash.com/uploads/files/202109070056048803.pdfIn PDF document text
    • https://e-room.co/userfiles/file/zokanovuvukumikovur.pdfIn PDF document text
    • http://sipsak.nl/userfiles/file/16859222681.pdfIn PDF document text
    • http://rsport.eu/yonexshop/static/file/46229975846.pdfIn PDF document text
    • http://www.sintsprev-ms.org.br/ckfinder/userfiles/files/33267904339.pdfIn PDF document text
    • https://tommytest.dish1314.com/data/html_editor/files/59614016081.pdfIn PDF document text
    • http://bburago.info/admin/fckeditor/userfiles/file/nobadibiburu.pdfIn PDF document text
    • http://www.gyndoktors.de/ckfinder/userfiles/files/58393053801.pdfIn PDF document text
    • https://masihpt1.com/contents/files/58241772631.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/027378068bdd8ec117501874636bcbea/47131077249.pdfIn PDF document text
    • http://kpdb.org/userfiles/files/xogezevotepitid.pdfIn PDF document text
    • http://sobateracota.ro/mm/file/19607072693.pdfIn PDF document text
    • http://artediapharma.com/upload/files/82533098072.pdfIn PDF document text
    • http://qazaqbanki.kz/data/content/files/dejigenunanuma.pdfIn PDF document text
    • http://mspchicagolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/59650869380.pdfIn PDF document text
    • http://zovsh.com/Uploadfiles/files/xolefuribexudurekoronut.pdfIn PDF document text
    • http://abwalabamaave.com/uploads/files/niliwesikalokafujebuziv.pdfIn PDF document text
    • https://studiecarriere.it/uploads/file/43023639262.pdfIn PDF document text
    • http://rts-3.ru/upload/files/51236416649.pdfIn PDF document text
    • http://cnhhgj.com/upfiles/userfiles/file/33068539234.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133f212cd1da---71910863810.pdfIn PDF document text
    • http://farmaciafoglia.eu/userfiles/files/75024610683.pdfIn PDF document text
    • https://receptabc.hu/images_banner/files/76474727765.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=what+the+best+golf+gps+app+for+androidPDF link annotation
    • 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_off0000d0b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e8c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C3 17164 bytes
SHA-256: a954ab1d195d2a9716c23ece013463a884f0f3d2ea7ce9206d568527933650a3
font_02_sfnt_off000114b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114B8 10912 bytes
SHA-256: b87d7c05a5a6e1256fccab418a4badba991fdc014584e970612863d47078e4bf

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