Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba43e6662a2486a8…

MALICIOUS

PDF

88.8 KB Created: 2021-06-27 11:15:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: cfd45fa6bfae0df62625bc03c4c7cf56 SHA-1: ee8a98120f5ce4ee690d709bfe48d1324860b5aa SHA-256: ba43e6662a2486a8c3e3816d1d84cdf43ed4139f528a203130c3606ab153dba9
212 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external links, many pointing to compromised CMS upload directories. The document employs a 'browser extension/update installation lure' to deceive users into downloading and executing malicious content. The presence of embedded JavaScript and the nature of the lures strongly suggest an attempt to deliver a second-stage payload, likely for credential theft or further malware deployment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ketchas.ru/uplcv?utm_term=monopoly+deal+online+free PDF link annotation
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160738a346cef7---88740897868.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/120fc02311e4f30be5646c09ef5a768d/jagisozagololubewuxirike.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/8cc4010c7655bbe55be235fb34ac4b0c/90296682752.pdfIn PDF document text
    • http://tecsun-moscow.ru/docs/file/mukewap.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160784f819e94f---84645070627.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072b82db01d7---73089286407.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/16077f71691094---51996095639.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c4627155315---95321353993.pdfIn PDF document text
    • http://ventilatoryzlin.cz/images/file/vigovakula.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/4e60d69acc73f555c71b4d899e9e726b/nuxiwepawevunux.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/4aa4e0c5510fabf6e513dc0db41bc4ee/55814163831.pdfIn PDF document text
    • http://didaconcept.com/admin/fckeditor/file/pedodo.pdfIn PDF document text
    • http://cathyourhair.nl/js/ckfinder/userfiles/files/mavubekapudijafaki.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb37bab8b9c---26096279458.pdfIn PDF document text
    • http://turexpert.md/userfiles/images/file/63370964034.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/673b112efd7d2232063de39fd86fc9c3/bizesamotodakaxosafoke.pdfIn PDF document text
    • https://cavalier-hundezucht.ch/userfiles/file/wozagegivakuwiwidit.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a963113dcea---mikoxor.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f853f2ed08---13234684560.pdfIn PDF document text
    • http://af.ssla.ru/images/fornews/files/vonejelasavejinul.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5a3c6accd3---wutegakusilafifigu.pdfIn PDF document text
    • http://hissekurban.com/resimler/files/kulipesigatup.pdfIn PDF document text
    • http://bundoreh.com/fckeditor/files/file/bilabugulovivared.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/863ae91b1a7dbeeeaa6e1ea40692fcfc/mumopunojunupo.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B8 17512 bytes
SHA-256: 30c433b4a637b3bff1116a00e0eaaefc21291d5ba7eb3b80dca654ffbc9bb4b2
font_01_sfnt_off000126ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013ec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EC2 10332 bytes
SHA-256: 20ba0f2185e78274385696459c14ba1087bee1aebe1cf3cd6f0e26e78de4ba57

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