Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0e69c57edea65fe…

MALICIOUS

PDF

82.8 KB Created: 2021-08-29 08:10:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 7972fbc4fab5045d1e5ecfd62916bb0f SHA-1: 8f35393244c01db85e08991baabb768dad0f0a5f SHA-256: f0e69c57edea65feac69ee5f68055748b80b75511ccdc0f617daf90bd771bf78
156 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, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://planet-for-events.de/userfiles/file/62099500510.pdf In PDF document text
    • http://alexanderjamesbackcatalogue.com/userfiles/file/13152800824.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609897968cfb1---defolazov.pdfIn PDF document text
    • http://aftckwt.com/uploads/file/pozowixeluvad.pdfIn PDF document text
    • https://davaocarrental.com/images/file/72180287077.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/da9dd6ce874a04e00b1731d3a9865920/kulasi.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/96622992606bf535453c75ad5308534d/komevanibamisukuxemivolu.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec36f37ed9---vitaji.pdfIn PDF document text
    • https://infiniteprospects.com/FCKeditor/file/bumagodigufatomilud.pdfIn PDF document text
    • http://ixtvs.de/_upload_bilder/_filemanager/file/62298244927.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/fud0v76j9jsra8fbcloge54d62/paninuvudolefof.pdfIn PDF document text
    • http://pitafest.com/clients/1/13/1337b7689af00ddd847345d48bd720ff/File/76951130168.pdfIn PDF document text
    • https://jancsoalapitvany.hu/ckfinder/userfiles/files/rabawukadukotu.pdfIn PDF document text
    • https://yasacompany.com/upload/files/28725141849.pdfIn PDF document text
    • http://mopi.eu/ckfinder/userfiles/files/monuxewekivazamonupopa.pdfIn PDF document text
    • http://www.hon-ro.hu/userfiles/files/28722274087.pdfIn PDF document text
    • http://autosklo.sk/pictures/file/botukaterol.pdfIn PDF document text
    • https://bestcoloringpages.com/userfiles/file/71232247268.pdfIn PDF document text
    • http://kxnjl.com/userfiles/files/jojadukeludejamijoxo.pdfIn PDF document text
    • http://netshopnepal.com/userfiles/file/82741837653.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dbe54954569---99572311849.pdfIn PDF document text
    • http://spbmedax.ru/sites/default/files/uploads/vevasagopufotagero.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16094bb9688694---71198514380.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160711b10edd82---22972403550.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/16116038c9e9db---vumavaxesimixelabezawako.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=spoken+english+notes+for+beginnersPDF 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_off0000dc8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC8A 18392 bytes
SHA-256: fa93015699d669c0e08182954f3656e099db56dd677962ecb2261604fbe8af05
font_01_sfnt_off00010bf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF5 10780 bytes
SHA-256: 1b3d1fa512bc65cc5084c4588e9d6e9a68e7368f8869230d677a0d12207d0bd1
font_02_sfnt_off00012477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12477 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1