Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d2cfe6a1ece3c78…

MALICIOUS

PDF

83.3 KB Created: 2021-08-05 18:47:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: 1d59e4466b5f82f3d58e84431b52b447 SHA-1: 378783661f248b0efdbb6fc166df657a3e3b296a SHA-256: 1d2cfe6a1ece3c7896a7bdc55a2c370bb92b6f405bd4b41b04a234917f8020dd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

Heuristics 6

  • 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.
  • 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://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4241768968---21642934493.pdf In PDF document text
    • http://614move.com/clients/4890/File/sinefajojapulu.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/83843574286.pdfIn PDF document text
    • http://metrocars.london/survey/userfiles/files/74504826800.pdfIn PDF document text
    • https://travelworld.ro/userfiles/file/koxiwuwerevojabel.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160e32414c98c9---34081180692.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/68bd127df6066ce8f0aeea5c0c81c528/rulobu.pdfIn PDF document text
    • https://iveducentar.com/uploads/assets/file/nisekexamagowiga.pdfIn PDF document text
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/0bf1721d32980295d64dcffff46fd33f/81529138461.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/94498188945.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/f2d7a9a747fb4f6f2cb8859e3af7c896/nepejajo.pdfIn PDF document text
    • http://sowitech.vn/upload/files/92609919075.pdfIn PDF document text
    • http://gramercy-grand.ru/files/file/74344044462.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/b7nasve1mu6lpvmgcnavm2rucj/30972923081.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/92168a3799bc21c88fe675ab52f69356/zezogegamoluvabutekisim.pdfIn PDF document text
    • https://www.webplease.it/wp-content/plugins/super-forms/uploads/php/files/mveifd6ogmm3obkk3edbmc3sk3/48146679162.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/e0970723539c1720ab0d26fc9e489003/bodiwuletibuwobevam.pdfIn PDF document text
    • http://franzoesischebulldoggen.eu/userfiles/file/mejewarexuregabolaxumipuk.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160824b168428a---vugipedesejematuferuwo.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/3ca395228b41e0c4a37c2f99ce19704a/jevuzoripodamuxanezurexo.pdfIn PDF document text
    • https://taxiparga.com/wp-content/plugins/super-forms/uploads/php/files/943735efc7e91147335b286888cc9094/78044641564.pdfIn PDF document text
    • http://gongotour.com/FileData/ckfinder/files/20210719_9927E1D2E65548C3.pdfIn PDF document text
    • http://katour.ru/admin/ckfinder/userfiles/files/69290740407.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/5c56445d84f7a894c3737faf28e20d11/5925576288.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083ef233ed9a---16553939500.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160fa5114e7617---39504707616.pdfIn PDF document text
    • http://apcmagon.com/userfiles/nenifekafonaruj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=essentials+of+understanding+psychology+13th+edition+citationPDF 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_off0000de05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE05 17408 bytes
SHA-256: 79e3f53a4b5ebca2068c452780516a7484ba4c3a8f8246278e58c92cd13f9067
font_01_sfnt_off00010b7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B7B 11320 bytes
SHA-256: 32562c9109bdc3d9d61b8c245665e27cbb01d9d8cb7271b8210c09cd808d2788
font_02_sfnt_off000125f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1