Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2edaaed94b6cf90…

MALICIOUS

PDF

92.2 KB Created: 2021-08-02 10:25:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: cdd1b7ff49d18001073530faccf10166 SHA-1: f90cde6a1d554d074b6c52658699ff55a53dafd5 SHA-256: e2edaaed94b6cf90d4728b3659b2babc47c62db789dbfc2136b14915d33f3277
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • 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.
  • 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://arohitourandtravels.com/userfiles/file/xatebuv.pdf In PDF document text
    • https://unitedfightalliance.com/ckfinder/userfiles/files/37207812746.pdfIn PDF document text
    • http://kythuatviet.vn/uploads/userfiles/file/90071542104.pdfIn PDF document text
    • http://heureka-cz.eu/files/tadepu.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8e8e3545fd---18325346168.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1609c9daeb057b---54141140918.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/7a978b16df65bc421592a8a85899cff2/jarurewalulojojinadowe.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8ej0t3mu3t1v9pmnuejghu2bf3/fadugul.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160a3f3f53b9ce---85075247162.pdfIn PDF document text
    • http://willettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xagaxepabiteremadekisixem.pdfIn PDF document text
    • http://vaness-sens.fr/ckfinder/userfiles/files/mozomeruzijalozeb.pdfIn PDF document text
    • https://theelementrama9.com/userfiles/files/tuseli.pdfIn PDF document text
    • https://ostrichpharmaceuticals.com/userfiles/file/5837204395.pdfIn PDF document text
    • https://akemi.ro/hirek/file/tekaf.pdfIn PDF document text
    • http://skyrunarser.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/21070812543757169127by3b.pdfIn PDF document text
    • https://cristalparkhotel.com.ve/ckfinder/userfiles/files/34098429058.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3383cd0d66---zaxowamodifumuzojewe.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/3a2cfbf60b04822e0c6732b8dc4fe19a/nezobakutowogo.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/9cc7fb6a1e4b7f2b1d5d5d7c4ecd616d/44081229953.pdfIn PDF document text
    • https://simondaulte.com/ckfinder/userfiles/files/nibetowit.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160840990309a8---dumixoxozivufu.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/8f4de4e7677992dad93a176fd5a89e33/3249876089.pdfIn PDF document text
    • https://e-uchebnici.com/img/file/gifosineloronakufo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=how+to+correction+in+scholarship+formPDF 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_off000101d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D4 17832 bytes
SHA-256: 3776d1fc1b70f4b928a7321dcc66dbdfa79f199b4fd236d84f7a64b0de719d6a
font_01_sfnt_off00013010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13010 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14827 10824 bytes
SHA-256: 2495d52c4b6143abb1da4b1a4f20b0711c6de03fc8a4cbbded36d47a83002a39