Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d0f8ea9dea60b6d…

MALICIOUS

PDF

82.4 KB Created: 2021-09-02 09:11:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: df71842aa03a98a60f568e7349f967bf SHA-1: cfd3de9ca8490de770dfa8a8812d909d3b4f20e0 SHA-256: 6d0f8ea9dea60b6d0f989b2404592d1f68107443f4d2e44b9d7012c41f48f283
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 0.9995

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://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160863f508e03f---fiwalawuw.pdf In PDF document text
    • https://digireg.dk/upload/woloxutunogapomixifozowew.pdfIn PDF document text
    • http://mim2010.ru/userfiles/file/duwelixukuz.pdfIn PDF document text
    • http://orchid-daikanyama.com/userfiles/file/85757914174.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/ddcde163fdab1cee6797a103cbcf12c7/75046738324.pdfIn PDF document text
    • http://elijasprojekts.lv/files/file/subagi.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610c7eb4c669e---kulojebuti.pdfIn PDF document text
    • http://spadhotel.com/basefile/spadhotelcom/files/neworikizereji.pdfIn PDF document text
    • http://diegogenna.it/userfiles/files/miluxeridojifa.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/xikikasos.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/f4ccf3e7e4152baaed3bd6e889ac7f3a/3822794745.pdfIn PDF document text
    • https://digireg.cn/upload/81891021340.pdfIn PDF document text
    • https://lentes123.com/aym_image/files/vonemesofo.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad47c904a33---lanubosuvujimijemij.pdfIn PDF document text
    • https://alasclub.gr/neuro/ckfinder/userfiles/files/wukabarojulukego.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160915dc83d362---fesafevukeseli.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/junatinilaxajarex.pdfIn PDF document text
    • http://ulrike-mayer.de/userfiles/files/6819461067.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/f792c7c5a8b1ef4122afa26015eaf868/mokigikisalilosubekolidub.pdfIn PDF document text
    • http://kapsalonindex.nl/images/uploads/dezopavidedapijuxijus.pdfIn PDF document text
    • http://pchs1967.com/clients/b/b3/b38b0c0be7ceca4b309dcb684d78a7c5/File/21385390521.pdfIn PDF document text
    • https://jmcoverseaspvtltd.com/uploads/files/41793378315.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=20+ft+lbs+to+nmPDF 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_off0000dca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f4bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BF 10176 bytes
SHA-256: 33fda4f9bdb810e59e6647f97be634f763fb88fd9a52fe2aee3a58048c80a0b6
font_02_sfnt_off00010b89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B89 18316 bytes
SHA-256: e8355512157154e7721ec622634b20eaf607c899f189d8364bcece64eba5fb6a