Malicious PDF — malware analysis report

Static analysis result for SHA-256 702a7f471d732001…

MALICIOUS

PDF

82.2 KB Created: 2021-09-13 16:46:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 4ea16171dd91a60bb1b8e89f444f95f8 SHA-1: c22736ccd1c6f4821bb9c3a7a26715158111a3c8 SHA-256: 702a7f471d7320014f65a360a6af448b39ec51e807afc39809b4ba01e728e620
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://seoulsquare.com/userfiles/file/moxavurobuto.pdf In PDF document text
    • https://eric-parnes.shortex.com/ckfinder/userfiles/files/57975624887.pdfIn PDF document text
    • https://inprovitmexico.com/ckfinder/userfiles/files/23632117010.pdfIn PDF document text
    • http://wine-paraphernalia.com/files/winep/_repo/file/rujinuzonirux.pdfIn PDF document text
    • http://maezawa-jidousha.com/js/upload/files/43523905330.pdfIn PDF document text
    • http://yevres.fr/ckfinder/userfiles/files/79867487409.pdfIn PDF document text
    • https://brune-schmuckwerk.de/ckfinder/userfiles/files/busikepogizavaxupetizesi.pdfIn PDF document text
    • http://mingmitrcoffee.com/user_img/files/53203254397.pdfIn PDF document text
    • https://inunekocp.jp/mailmagazine/upload/files/15664808988.pdfIn PDF document text
    • http://studioguagnoni.it/userfiles/files/zosise.pdfIn PDF document text
    • http://fotofolliasanlazzaro.it/userfiles/files/18489345928.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/6eef986948082ebdf5d16e855e744006/16515889695.pdfIn PDF document text
    • http://euskararenginkana.eus/files/galeria/files/94884767624.pdfIn PDF document text
    • https://sukienmiennam.com/userupload/files/duxoge.pdfIn PDF document text
    • http://vanillasky-ch.com/images/files/92552785775.pdfIn PDF document text
    • https://mraos.com/web/userfiles/file/96606227429.pdfIn PDF document text
    • https://www.mmgrowersg.com/ckfinder/userfiles/files/tujuzevilimotazasikumubi.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/1613e4bdae5d6f---96107630907.pdfIn PDF document text
    • https://ka-base.no/images_students/files/begatufagi.pdfIn PDF document text
    • https://tims.ro/ckfinder/userfiles/files/83783639108.pdfIn PDF document text
    • http://kapsalonindex.nl/images/uploads/zuvewofumiselex.pdfIn PDF document text
    • https://moveo-sport.pl/userfiles/file/ribufajisadamom.pdfIn PDF document text
    • https://webtechnocrats.com/upload/file/73428371943.pdfIn PDF document text
    • https://medpressa.ru/files/file/26609525334.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=black+game+ppssppPDF 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_off0000d874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD874 19336 bytes
SHA-256: 3d758d4a546a34c8301f469280f8abcc98d422a7bf7aee8823a862d77bc47845
font_01_sfnt_off00010bc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000123df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123DF 10348 bytes
SHA-256: b9e340edc2c61bea28b9fcd95de9055dd05fedb4cb6f834d80379b6142011120

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