Malicious PDF — malware analysis report

Static analysis result for SHA-256 6914dda78f19a70d…

MALICIOUS

PDF

91.2 KB Created: 2021-08-15 10:05:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5b948bf40dad86417368e6849563daea SHA-1: 16342a3bd2b833a023ad87fa6ea542e5942b438f SHA-256: 6914dda78f19a70d651e236cdbc7aa055f7df8d36901ef69932c44203eac6272
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to disposable domains and compromised WordPress sites, disguised as movie download links, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely involving the redirection of users to malicious content or the download of further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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.
  • 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://krisoc.ru/uplcv?utm_term=tamil+hd+movies+download+2021 PDF link annotation
    • http://xn----7sbbbizu2bxaod.xn--p1ai/userfiles/file/datebadujeva.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16078a00734eb0---96742424637.pdfIn PDF document text
    • http://school19-zav.ru/userfiles/file/vudugoxozunumeberiwifi.pdfIn PDF document text
    • http://wami.cc/data/files/nunufobijex.pdfIn PDF document text
    • https://tkquiz.com/userfiles/file/rokizut.pdfIn PDF document text
    • https://www.tri-or.fr/tri-or/ckfinder/userfilesfiles/79622443993.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/3e07f4b89fda1fc7632cb20199674d81/4824338312.pdfIn PDF document text
    • http://eros-arena.de/eros/userfiles/file/5870431192.pdfIn PDF document text
    • http://wagnerfamilyreunion.com/clients/866685/File/78511627526.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c3de103e8e3---4564976815.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/d1b0efd879558572d67155c451d2ecca/72869634374.pdfIn PDF document text
    • http://daydala.com/userfiles/file/14728015365.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609cedbabf6c1---79127456527.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b87de1a49f2---17602499508.pdfIn PDF document text
    • http://hyundai-dongdo.vn/images/files/89123014527.pdfIn PDF document text
    • http://gewoongroen.eu/app/webroot/files/userfiles/files/29762184346.pdfIn PDF document text
    • http://xnucleus.com/members//member_images/files/3222247739.pdfIn PDF document text
    • https://cosmopolitanhotelbg.com/uploads/wysiwyg/files/71250479625.pdfIn PDF document text
    • http://mcserpenti.com/userfiles/file/gifimaxepufes.pdfIn PDF document text
    • https://sport-jicin.cz/dokumenty/pirove.pdfIn PDF document text
    • http://ritadas.in/userfiles/file/78210650193.pdfIn PDF document text
    • https://careersourceokaloosawalton.com/files/public/31166777888.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/4gdasi9736jj76bcihoevsiclv/95441753538.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_off0001003f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1003F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011856.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11856 10724 bytes
SHA-256: 310e3bdb13208a7fa2a3cfddd504d887a7754ae16854ade58c2e9d148a5473f7
font_02_sfnt_off000130d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130D9 17616 bytes
SHA-256: 5710b198b2cdeec2170a7464b06ad88f842adb693014e6a919dfb644618cd109