Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce46f745e9492b69…

MALICIOUS

PDF

84.7 KB Created: 2021-06-27 08:31:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: c65f7a8ceed97fd170622788c6d91b65 SHA-1: e4cae862aa6f9bf700db16246943d590f44bde74 SHA-256: ce46f745e9492b69d08a59f33c2e33dca199d9da612edcc43ae18b7d27367226
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document functions as a link farm, containing numerous embedded URLs that point to various websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates that these links are likely used for SEO manipulation or to distribute malicious content. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • 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.
  • 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://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/r3974bpdom8saullokuibt3hga/galuvuxesanepolufazafe.pdf In PDF document text
    • https://washlounge.in/ckfinder/userfiles/files/4241147800.pdfIn PDF document text
    • https://pima-alarms.net/slicice/file/61962302312.pdfIn PDF document text
    • https://swagath.co/new/ckfinder/userfiles/files/lokawarojobonezekogud.pdfIn PDF document text
    • http://fbchitchcock.org/clients/8/8b/8bdff38a390027835eb24981312b950c/File/86168368769.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609b5edb2742c---40723955270.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3875d85463---pojipunepugefun.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607375134c2d8---25527449968.pdfIn PDF document text
    • https://deniz-sogutma.org/img/userfiles/file/4551184722.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c106a70e51b---22979651787.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/cb0c00a4dfd42bddc7572b179b9e6b5d/nugexefadaxopijifosetur.pdfIn PDF document text
    • https://tyeetomsfishing.com/userfiles/file/kotakisefiwigogixidiz.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/d7764f0e177c3e6c1e4c81a9ea780d17/demumijudot.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160cc6a79c885e---26717629050.pdfIn PDF document text
    • http://homelife-superstars.com/image/files/sulidemewugopijov.pdfIn PDF document text
    • http://ateliergermain.net/sites/default/files/file/97777121710.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/0me5oiml2aes7tl7usq4v7t45b/70254056308.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/9c8d47e58ab4359cf6d678d709afd4e3/texegediwagujet.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd355043c3---5162978075.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/5120d8bddb5058bebbe87c2257d38763/vibixedugowuzibixujon.pdfIn PDF document text
    • http://vintageguitar.ru/ckfinder/userfiles/files/ruzuxate.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/c607810c6c21bd18330913d17b3e65c2/bezitamedodanofufal.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/oo2bsisp94hvo6od7bsgtehmf0/52175250474.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608b3f72c65c3---fotawumusamu.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/wikilibitufexomu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=profit+and+loss+and+discount+formulasPDF 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_off0000e69b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE69B 17660 bytes
SHA-256: 6bf204c35883b987ab8d1c3883a46d868a83dfe98c42cae96513080d8a72a3ee
font_01_sfnt_off00011579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11579 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012d90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D90 10608 bytes
SHA-256: 1ddc84242b943f0dbc5ae7684e0eadec62db6a3c50a58d1ba1e8ba6fce254c64