Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e684ed9f4003a10…

MALICIOUS

PDF

98.6 KB Created: 2021-07-22 19:10:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 2ab9da7f000d2c1dff535698e424b5dd SHA-1: 723ae6c9d64f3cd6b785715715a61fe2736b4a99 SHA-256: 0e684ed9f4003a1087ee0068fb08be0ab6c18f20152796cc81dd0841d97be2fe
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 0.9973

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 http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/36761d430a7c5f2bf7578cd58223cd99/xinenajitugifupiwawirero.pdf In PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608d42003a1db---genube.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf4874badd---bokewukedola.pdfIn PDF document text
    • https://bistakalikotenetwork.com/userfiles/file/soxefexok.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160839e153d47d---71863247485.pdfIn PDF document text
    • http://z500.si/files/52794533516.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/b84418e348e241252e9dd6d4645c3fd2/42257319831.pdfIn PDF document text
    • http://montgomery71.com/clients/34132/File/55470813021.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/wuwubezavoxagagevazij.pdfIn PDF document text
    • https://ecoretras.com/file/65193265441.pdfIn PDF document text
    • http://www.gc-antey.ru/ckfinder/userfiles/files/gojegimodaleruzagafugefe.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/0u1m836kt61ka5brjvitutlrqg/vonirosofafuvu.pdfIn PDF document text
    • http://yournamebadges.com/withyourdog/cms_uploads/file/sajubeneteganaxe.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608be9181dffe---80236088885.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/1da39f4d2f199d90b28f008b1d299b93/nuviwanezuriku.pdfIn PDF document text
    • http://www.deewanalarab.com/up_imgs/47011392749.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609473e0c2242---24106993466.pdfIn PDF document text
    • http://goref.ru/files/file/nevoxin.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/49d98adc85dd74309cea7672d06dbd2a/99909923813.pdfIn PDF document text
    • https://aronabritcan.com/userfiles/file/75217357254.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3d6cf4813e---puboguguvikavuzus.pdfIn PDF document text
    • https://creteotels.gr/FCKeditor/userimages/file/xizunuridisozozuzafovo.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/siwopevofop.pdfIn PDF document text
    • http://kotolantopeni.cz/file/tofubovegalo.pdfIn PDF document text
    • http://ithaca1960.com/clients/8/87/874e400c25abfb160fd1c0cf9913fcd0/File/22972015148.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=non+taxable+food+itemsPDF 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_off00011cbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CBF 18144 bytes
SHA-256: c13a9ebec8cee3cc9f3d78c5af516fafd4e3b1c4f6fd7c46ff0a5bcd8b93d766
font_01_sfnt_off00014b22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B22 10636 bytes
SHA-256: 3f2076dfc78bf64a9d74baa571d02eac29ccf51ac9f00dbd5cce69e610b42105
font_02_sfnt_off0001637f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1637F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1