Malicious PDF — malware analysis report

Static analysis result for SHA-256 15e63d3ffee7cef4…

MALICIOUS

PDF

93.7 KB Created: 2021-07-28 13:38:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5fdaeb585c44f35fde71c60ed17bc5e2 SHA-1: 8a6e94823529cec633ea9526f6e0f62a1e9297fd SHA-256: 15e63d3ffee7cef4d73e5486aedc4f3a2ba237b99c82e8985a96b832a2099f15
216 Risk Score

Malware Insights

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

This PDF document employs social engineering tactics, impersonating a cloud file-sharing service to trick users into installing a browser update or extension. The presence of multiple URLs pointing to compromised CMS upload directories and disposable hosting suggests a phishing or malware distribution campaign. While no scripts were directly extracted, the nature of the lure and the detection by ClamAV as a phishing trojan indicate a high likelihood of malicious intent, possibly involving JavaScript execution for payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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://alexanderkanevskyartistbiography.com/clientMedia/file/51974034081.pdf In PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b42cc13c322---80498327427.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/2336c84c209dae16692d9670be991bf0/20886177616.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1f805432e---raradoxojala.pdfIn PDF document text
    • http://merwepizza.com/upload/file/laruwapomalabuzo.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/93407492977.pdfIn PDF document text
    • http://gospel-pour-100-voix.com/fichiers/newsletter/file/galenumipelipotoxexu.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160cfaf6052e05---mukakujugeweku.pdfIn PDF document text
    • http://master-br.ru/img/file/ninokexobuzunenarapim.pdfIn PDF document text
    • https://safrano.pl/userfiles/file/nijonufe.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087a6ac5b3c5---jopijelakib.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/felapdgtq8euhk3229q4lfcmm2/gusabekutetusoz.pdfIn PDF document text
    • http://lyonsmcafeereunion.com/clients/a/ab/ab8eb7fa8d7cf94b91f67e7e346c80ed/File/sopurowe.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e02603e61b5---67124948770.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/86a9d8dafc11b7f29eb279539bc35dd8/tuvidozujevamaliwawo.pdfIn PDF document text
    • http://bigsvatcharasith.com/userfiles/file/lalamuro.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/292da1d68e401670ee045e445792bafe/54525300299.pdfIn PDF document text
    • https://all-stage-meditation.tw/uploads/files/60b9312382dbc.pdfIn PDF document text
    • http://ingmontagna.com/userfiles/files/72240305963.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160821e9e5aa5d---66044650082.pdfIn PDF document text
    • http://simonide.org/userfiles/file/5599052719.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/919b5dfb84821f22fe0829351d1e5fd9/52630298372.pdfIn PDF document text
    • http://schs1968.com/clients/861610/File/xozarafubafewalevozu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=conjuring+2+google+drive+hindiPDF 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_off00010afd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AFD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001230f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1230F 17156 bytes
SHA-256: 614044ed907969b3bd4cfb7977da418a8a02853c56379455601b2c623500918d
font_02_sfnt_off00014fdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FDF 10548 bytes
SHA-256: 5847eb08bcc7b5133d9ae8f21dc7d8a9d13627596a7ef3ca5fd38ff8917a24e2

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