Malicious PDF — malware analysis report

Static analysis result for SHA-256 48619bd30e0bf2a6…

MALICIOUS

PDF

86.0 KB Created: 2021-06-27 01:26:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: c28be0ea7d868d652e568d17dc66c36a SHA-1: 74aa2bf774e52b0c290102f63af373e7559cbbbf SHA-256: 48619bd30e0bf2a64a4532fe016aa4da778c85ba9f1d121a76de38e5b1020d61
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 or disposable hosting. The URLs suggest a lure related to financial services, indicating a phishing or scam attempt. The embedded JavaScript likely facilitates the redirection to these malicious links or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://smidgel.ru/uplcv?utm_term=unsecured+installment+loans+for+bad+credit PDF link annotation
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/866d1f12b8efa90506a0abe91913eb4b/31432603385.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/xudanaboguzeza.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/momopowefabemenidazegig.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/cd8192634687edbde99e456d88dde49c/gutatijuxewuletesu.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/d1f6fd49773136e146f1f445392c05b6/luxajadilivip.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/b15d68bd8300c2d99d0eb9cf7922db5a/58370767604.pdfIn PDF document text
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/becdcf85f60927cc679556cb8dc4aa3c/muxubadiwotuduzezibusedu.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/8f4c5a6c408d78c477d5b1ef162ee3fb/33052289401.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d08443a2687---pugirazes.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/134f7a7c4813d03686b84981ea01ab19/zefuwipikeropumituv.pdfIn PDF document text
    • http://skyrunarser.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/210613092246951480586gpr.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/0c2b4a0445e9b467e685236cbafd9d17/fuwijefisub.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16088b9933a49e---51086494785.pdfIn PDF document text
    • https://cambodiaangkorhomestay.com/userfiles/file/97639907311.pdfIn PDF document text
    • http://irk-yoga.ru/upload/files/gojozewovodedul.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/ed066fd776b41e04257cf03dc5b9ba8c/53234813111.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1608bbbb159884---rulinozibawunev.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/hvbarntfi6re4suk4levggigu5/kasoravexinifupaz.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ace25abfb---5817685635.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1607633658d9f1---14981398378.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608d886c95e42---rurenabuxufirivowozelaga.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/jqgtnvjtk5edllcg8rnamn8693/38086521422.pdfIn PDF document text
    • https://susta.vn/userfiles/file/85996179509.pdfIn PDF document text
    • http://roland-toys.eu/userfiles/file/77641321596.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/6mgal7df8ijh4p7onlrob7lpmp/mufolurufik.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB89 17456 bytes
SHA-256: fe1b2727f2bb565745b4d5d1c4909a467af8b8e98074757f9a698efc0c1c1f71
font_01_sfnt_off00011958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11958 10884 bytes
SHA-256: 4ee7c08c72115593ed5141bc50c95d1e2cdbcc5e3f71b9843968d135c3dc9234
font_02_sfnt_off0001327c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1327C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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