Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0d789a84d6fc005…

MALICIOUS

PDF

84.2 KB Created: 2021-09-08 18:22:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f516eee5e646c6a85a16576cdaaf47d8 SHA-1: 8e58a9829a9c5ef258f2a47fd9fa8e3137ae540b SHA-256: b0d789a84d6fc005c1c18365a9535ff0b53a0373fc0327683ae45f74d0e54b27
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ML classifiers and ClamAV as malicious. It functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised CMS upload directories. The presence of these links suggests an attempt to direct users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://cubic.is/userfiles/file/zizepixogekodobogug.pdf In PDF document text
    • http://efuturesthai.com/uploads/file/99977940134.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/4936db786314b3882562ab482c1f4a00/vetomiworadazumebuj.pdfIn PDF document text
    • http://ned.ru/uploads/files/silowasexotinekakuwemadax.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/855402d562f96e3f7c673b97d69fb4d0/59392786119.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132ba76280b5---37611714709.pdfIn PDF document text
    • http://villaelen.it/userfiles/files/xapewixag.pdfIn PDF document text
    • https://dcicz.org/userfiles/file/zisorutajalelelekevu.pdfIn PDF document text
    • https://jobtiara.com/files/files/85018408367.pdfIn PDF document text
    • https://doan295doson.vn/namthuan/images/news/files/naxezirorowiwitewapej.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132aaaa6bf09---mefomelakumuwazu.pdfIn PDF document text
    • https://amzentransportationindustries.com/admin/imagetemp1/file/vamadiniwebolosazimuk.pdfIn PDF document text
    • https://www.igescanada.com/ckfinder/userfiles/files/79554180723.pdfIn PDF document text
    • http://euroear.eu/ckfinder/userfiles/files/78299142962.pdfIn PDF document text
    • http://tvoirostov.ru/ckfinder/userfiles/files/minazubegokemigobixusuti.pdfIn PDF document text
    • http://www.jucadent.es/ckfinder/userfiles/files/73505186872.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/66011353116.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/16136ac95317c9---kejonezisa.pdfIn PDF document text
    • http://fernandopelosini.it/userfiles/files/jovar.pdfIn PDF document text
    • https://marathonroller.com/userfiles/files/ponejimapogepare.pdfIn PDF document text
    • http://elsped.hu/files/file/43614565786.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/482c041255fc59643a76c7f69b0d414e/20535848621.pdfIn PDF document text
    • https://livewireeventz.com/userfiles/file/gamunavutam.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=hadith+qudsi+english+pdfPDF 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_off0000e4bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4BF 10792 bytes
SHA-256: 8b1feda53f0a3d2d46a29af669e39866f246b748e3c12deddc6bed39ebb0d53e
font_01_sfnt_off0000fcee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCEE 17820 bytes
SHA-256: d1a412da6f0e11eca771deab5612c54eeb582d307194d1987280c8afd6c2b013
font_02_sfnt_off00012b87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B87 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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