Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fe4f50250f10d88…

MALICIOUS

PDF

89.2 KB Created: 2021-07-25 01:03:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 2208c0dd3415947d7cf9caf0b116d75e SHA-1: f162f08571fc2d3f1c256ca479471498bac3ea53 SHA-256: 4fe4f50250f10d888c25462e6fc878e8a60face7f8438e1577e6838735b361ff
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm directing users to multiple domains, some of which are hosted on compromised CMS platforms. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway security. While no scripts were directly extracted, the PDF structure and link farm behavior suggest it's designed to lead users to malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://jarosi.hu/files/file/zonezefajaberunimamuwa.pdf In PDF document text
    • http://hokeypokeychallenge.com/clients/7/77/77ac66e313b6cb4bf602f1678accca72/File/62511216783.pdfIn PDF document text
    • http://kino-cosmik.ru/sadm_files/wozavejifif.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/b45f23895d10f0396fab020bc68f25fd/jirinojukotu.pdfIn PDF document text
    • http://cuanhuaabshanquoc.vn/files/duzipowanofiwitipubo.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/eaf8e0d173694e40514481fcf8ca5f11/xekevowedezagene.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/crul686i22sejh3epqgbkopbq8/96928031187.pdfIn PDF document text
    • http://pnlestari.com/visitbali/image/files/35131702934.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/f4v72stnuacq2k8bl6rkvokmaq/xuzilusivid.pdfIn PDF document text
    • http://aivieksteslaivas.lv/userfiles/file/gixitakodulopomikiruto.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab85f871906---noxipavekatejajapopesira.pdfIn PDF document text
    • http://pension-erlkoenig.de/img/editor/file/93929541861.pdfIn PDF document text
    • https://sunpower.lv/ckfinder/userfiles/files/13010150192.pdfIn PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/2dc0c46f6222c31be03ecc8d51193a87/xizepibezakepusuju.pdfIn PDF document text
    • http://toshiba-center.ru/uploads/files/vokemejadakurevik.pdfIn PDF document text
    • http://graphicyazd.com/ckfinder/userfiles/files/61103391737.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160877ae7b7afc---goronuxelorebav.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a450ee100d2---17954832362.pdfIn PDF document text
    • http://stylekd.ru/files/81222078804.pdfIn PDF document text
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/325515d60d9280cdcadef3552d529358/zunipixepoluw.pdfIn PDF document text
    • https://die-elke.de/cms/elke_page_files/file/669207317.pdfIn PDF document text
    • https://pasarangroup2.com/contents//files/4054510956.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16070cc56a2f3e---bexoxoxa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=pokemon+gba+rom+editorPDF 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_off0000f4d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010cef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CEF 10608 bytes
SHA-256: 232b12190349b05ec8048053e792cdd52351f0292c5fc14bb41e1011c91f2ab8
font_02_sfnt_off000124f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124F3 18196 bytes
SHA-256: 7bd22dcb067e73c790233117a2ff9e847265a981f7e38888a0171db120e35468

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