Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b2ca1f0a8c399b9…

MALICIOUS

PDF

83.2 KB Created: 2021-09-06 17:24:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: fd47367426f40664a99cdda5ad7dffec SHA-1: 318688bb37b1ebbdf274d1adf1891085e1ca2a23 SHA-256: 9b2ca1f0a8c399b915282888dabcb9447dc7df3c41f4cffb824aaf3c548b6156
156 Risk Score

Malware Insights

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

The PDF was identified as malicious by ML classifiers and ClamAV, with heuristics indicating it functions as a link farm. Multiple URLs point to content within WordPress upload directories, suggesting compromised websites are being leveraged to host or distribute malicious files. The presence of numerous links and the nature of the detected heuristics strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16074cfd3b0038---libiwelanugefabanow.pdf In PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/q1i0thm4m9su9bq4hqq0iuk32f/76345729019.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/17357418053.pdfIn PDF document text
    • http://berrybucs1973.com/clients/3/3a/3a2d6910be1067feaf6dc79f90d505e0/File/3346822511.pdfIn PDF document text
    • http://shriramashramssschool.org/userfiles/file/bokekuvufusadizomo.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/xivevibajefokotiziz.pdfIn PDF document text
    • http://nova-auto.com/upload/pitularezuwetomubid.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608363a40f9c6---96345205817.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/454da60164d14b9c24de44ba356521f7/zafawevara.pdfIn PDF document text
    • http://parfumkin.ru/files/files/44451401698.pdfIn PDF document text
    • https://fullmagicweekend.com/ckfinder/userfiles/files/piwevon.pdfIn PDF document text
    • http://onlinetalk.jp/app/webroot/img/fckfiles/file/98665987611.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/743d7e8dd326155f558b850c42eb2ec4/67713286808.pdfIn PDF document text
    • http://podlahypilat.cz/admin/file/44196648435.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/5dde928825f3987f2cae3b3d79d81442/16977027317.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/56038284241.pdfIn PDF document text
    • http://agriturismofattorialucciano.it/ckfinder/userfiles/files/jezowavunim.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a08a08d8b5c---29685340929.pdfIn PDF document text
    • http://gemculture.com/userfiles/file/medotenimu.pdfIn PDF document text
    • http://holzbau-napetschnig.at/lenubekurudax.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160fa826d0adf9---jugesewawetakinegas.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16100795e39a6c---32579186168.pdfIn PDF document text
    • http://geniuschulatutor.com/userfiles/files/tikiwotedesazigojur.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=convert+pdf+file+to+multipartfile+javaPDF 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_off0000ddde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f5f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F0 18344 bytes
SHA-256: e33a466e0d957b8285a7a60c6c8895562f2d949393f7e32a905cf96779cf9705
font_02_sfnt_off00012628.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12628 10820 bytes
SHA-256: 3429cb40edbb729618aac6e58e3cadc3115724053f5cd7c22c73f0fb4d217ff2

Open this report in the interactive analyzer, or submit your own file for analysis.