Malicious PDF — malware analysis report

Static analysis result for SHA-256 693c0d9a9b6c1ff8…

MALICIOUS

PDF

75.5 KB Created: 2021-09-27 13:16:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 1ec589ef1f3b87b6c0825abaa4808913 SHA-1: 31a0837e395039714549494a1c0335c4fc65c783 SHA-256: 693c0d9a9b6c1ff8342f6306d4e76f0aa6e9ad8e91c15066ab1bf96cb081d8bd
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external links, many pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or trojan delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • 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://mackyz7automotive.com/js/upload/files/29739740410.pdf In PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161433a526cc20---befezuvowezapubu.pdfIn PDF document text
    • https://anpheatingandac.net/nbloom/fckuploads/file/mojapuvexijiwafetod.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614cdf17a19a8---97073789678.pdfIn PDF document text
    • http://studiotecnicoprato.eu/userfiles/files/kukubirovem.pdfIn PDF document text
    • http://coaching-scolaire.net/userfiles/file/53314689397.pdfIn PDF document text
    • http://speakingaboutnetworking.com/ckfinder/userfiles/files/78180004814.pdfIn PDF document text
    • http://rnralpha.cz/res/file/bisowavapinegegabeni.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/5a252b796fac5d67488ffd99f7622ba9/79803351630.pdfIn PDF document text
    • https://clubsecurite.fr/webroot/upload/files/51550070116.pdfIn PDF document text
    • https://majubesar.com/contents/files/rurosifibuxisemenileki.pdfIn PDF document text
    • https://groupburuemas1.com/contents/files/39200859271.pdfIn PDF document text
    • https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613f3423bec53---50078193695.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16145ad334d02f---bolakoxatexonega.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/goderovo.pdfIn PDF document text
    • http://chrisdepanneservices.fr/Sites/cds/files/tefituwoxusix.pdfIn PDF document text
    • http://zespolbahamas.pl/zdjecia/file/72984840278.pdfIn PDF document text
    • http://abwhopewell.com/uploads/files/simogak.pdfIn PDF document text
    • https://infotechsystemsonline.com/ital/www/img/file/63913968199.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/57695891327.pdfIn PDF document text
    • https://eownauto.com/uploadpic/files/31448129376.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/c9b1e7bea4c8ac0786768ea19bc04f10/57421025432.pdfIn PDF document text
    • http://artpolyclinic.com/file/files/74767143902.pdfIn PDF document text
    • https://www.tri-or.fr/tri-or/ckfinder/userfilesfiles/wetotakejufexaxuvab.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/161495f338a246---notolowinif.pdfIn PDF document text
    • https://factorysales.com/userfiles/files/datibar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=zombieland+full+castPDF 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_off0000bef7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEF7 18796 bytes
SHA-256: 75ec0579ea84371cf38a69fa7c60dc0ac79865fcc59205aec56ce23b3af0d339
font_01_sfnt_off0000efe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE5 10740 bytes
SHA-256: 5ec9f0d4c350a20ccc56a47db1df952d8569da5f395797726f78e26883f77d2d
font_02_sfnt_off00010893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10893 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1