Malicious PDF — malware analysis report

Static analysis result for SHA-256 64748b5cd87cd297…

MALICIOUS

PDF

89.2 KB Created: 2021-09-21 01:57:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c7484d481e9171b28ba3c97c722646c4 SHA-1: 58294b71463e35de163f2027bad7d6469c037300 SHA-256: 64748b5cd87cd297a40484b30ca451b1087f44dbf8856a43516cc5d695bca9e5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to various websites, some of which are hosted on compromised CMS platforms or disposable domains, likely for phishing or malware distribution. The embedded URLs, such as 'https://queure.ru/uplcv?utm_term=spartacus+gods+of+the+arena+season+1+480p+download', suggest a lure related to popular media content to entice clicks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://queure.ru/uplcv?utm_term=spartacus+gods+of+the+arena+season+1+480p+download PDF link annotation
    • http://spitalmoldovanoua.ro/ckfinder/userfiles/files/govuzuzakotif.pdfIn PDF document text
    • https://galerie-louise.be/userfiles/files/boxoluwesudugep.pdfIn PDF document text
    • http://masonhn.com/d/files/resepapanas.pdfIn PDF document text
    • http://albertopizzetti.it/userfiles/files/lonene.pdfIn PDF document text
    • http://kleinschadenexperte.com/userfiles/file/10068170548.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/beborijogur.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/g9npg3n3mpj65gss9hdqvqcv9q/xopidemi.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fb0f9f1f9c---fozotanazigen.pdfIn PDF document text
    • http://sakuragiramenandsushi.com/uploads/files/98579887140.pdfIn PDF document text
    • http://halmar.info/userfiles/file/lefibokevasiroxeloj.pdfIn PDF document text
    • http://meghdoothsuzuki.com/uploads/jasamut.pdfIn PDF document text
    • https://nvsrolko.org/ckfinder/userfiles/files/53504772431.pdfIn PDF document text
    • http://zonwering-belgie.com/ckfinder/userfiles/files/36657193329.pdfIn PDF document text
    • https://resonanceacteurs.nl/userfiles/file/tigizu.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/161332278bce0f---35118023413.pdfIn PDF document text
    • https://gonguyenkhoi.vn/upload/files/fesofera.pdfIn PDF document text
    • https://muzeumkonstancina.pl/attachments/file/kimamedapulomijebenipew.pdfIn PDF document text
    • http://montpellier-businessplan.eu/mbp/upload/images/images/upload/ckfinder/2335762949.pdfIn PDF document text
    • https://rwd1.thadv.com/upload/files/38382653144.pdfIn PDF document text
    • https://wita.lt/images/files/16250963752.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613197755d7f1---pibupobi.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_off0000f0a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A7 19444 bytes
SHA-256: 56db75ef5f535d4c32493d2af7450409903a0623f955ae27c6d5929a58fd3b43
font_01_sfnt_off000123e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123E0 11528 bytes
SHA-256: eb1606716abe4ab7da5a048ea7ae13e827ec83994982c4c48a56449848caffc9
font_02_sfnt_off00013f13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F13 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1