Malicious PDF — malware analysis report

Static analysis result for SHA-256 298d93db5763220e…

MALICIOUS

PDF

73.7 KB Created: 2021-09-02 19:42:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b08d5d0ee2793e96e67e6dff326947ba SHA-1: db1c227ff707f043d4ab7e9c1f0bce98192bf7e2 SHA-256: 298d93db5763220e7e01d621a815d7d891d61fffc61486c28e7dc5d00b063244
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript, which is a common technique for executing malicious code or redirecting users to malicious sites. The numerous external URIs, many pointing to compromised WordPress sites or disposable hosting, strongly suggest a phishing or malware distribution campaign. The ML classifier and ClamAV detection further confirm its malicious nature, likely as a lure to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://irlanc.ru/uplcv?utm_term=convertir+de+word+a+pdf+trackid%3Dsp-006 PDF link annotation
    • http://coinproject.com/userfiles/image/file/tapozasurupukuzus.pdfIn PDF document text
    • http://kappp.ru/js/ckfinder/userfiles/files/3804536174.pdfIn PDF document text
    • https://batikatravels.com/userfiles/file/19719069304.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/0fc9cf8557d80db7b68381eb38fa3ac8/83438383850.pdfIn PDF document text
    • http://nct-vn.com/userfiles/file/wojukejimux.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/16072b47a15030---domevixenikomulusasopozi.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/09686db8df524cf72172b31c857c6160/95556957686.pdfIn PDF document text
    • http://fujavietnam.com/images/Download/85969845005.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160738a00748dd---samafen.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/16083941de42d3---28530759274.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/580e44db19ba2a9f75a3fdb91d277a6e/keduvaniromovodegavepowo.pdfIn PDF document text
    • http://kaies.net/upfiles/210829104707484433edzf3e.pdfIn PDF document text
    • https://oversaslogistica.it/file/bumebetugumusenofi.pdfIn PDF document text
    • http://greenld.com/userfiles/kagelutab.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ac41d7918---22394417448.pdfIn PDF document text
    • http://queensflower.nl/clientfiles/nopedebexipuzajesifeda.pdfIn PDF document text
    • http://skrutit-probeg.ru/upload_picture/file/kikiwagobox.pdfIn PDF document text
    • http://blpest.com/UserFiles/file/77031247976.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607273d9b1fcb---fikebarurutufezifeme.pdfIn PDF document text
    • http://trunglam.vn/uploads/userfiles/file/tufiwukomusudu.pdfIn PDF document text
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/qp5eg4mn727o6m3tp6fd9c2b66/89445274556.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/cd1faccb9ad1987687a87e70e92adb5c/12111807300.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611c95665aa37---vekaxamigezarepidoranipo.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_off0000bc47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC47 11212 bytes
SHA-256: e151ed401bb179db1c664d7f813f0bef2596f1cc1a89cf536bd24fdac4f15000
font_01_sfnt_off0000d6e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eef2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF2 16400 bytes
SHA-256: c49142380010c6b7d4ee64b00e7b7cb4d8090c67afb86c0cd80dcf080fefd88b

Open this report in the interactive analyzer, or submit your own file for analysis.