Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fe579a3993d95cc…

MALICIOUS

PDF

87.9 KB Created: 2021-07-31 16:47:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b8096fbc1f8c19c4976145a77e629fe2 SHA-1: 5b0ec9fd1d6fabddb83a22d264c48882c879990b SHA-256: 0fe579a3993d95ccc6a6a7aa9bc6c4046242bb36ce77f73475fcb237bcaf4a7e
156 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised WordPress sites, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable, but the heuristic firings and URL analysis are sufficient to determine the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160835b6bc214f---42728719174.pdf In PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dfa27614b9f---41788054209.pdfIn PDF document text
    • https://thietbivesinhanhhuy.com/asset/files/80543180192.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cc2d7715d87---48530135181.pdfIn PDF document text
    • https://castilloexterior.org/ckfinder/userfiles/files/lukuxujiwu.pdfIn PDF document text
    • http://granitemountainranch.net/userimages/48148675990.pdfIn PDF document text
    • http://cl-metalparts.com/d/files/53769615466.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/sovajaloriforera.pdfIn PDF document text
    • http://ural-kip.ru/admin/ckfinder/userfiles/files/36820105290.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af63a727373---punelusojosetizawe.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9bcbb03904---dapaxofujavumatovenebo.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/b5vsqd2mbjt8o90qu18jhvoek6/wovudaxalepogigapuno.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/gufurezazi.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a2165700e07---85903432179.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/a51fe78548705d96cb213ce16d707e33/46991691111.pdfIn PDF document text
    • https://tonymusic.se/UserFiles/files/rumisazozavafupeti.pdfIn PDF document text
    • https://rdw-wolf.de/backend/ckfinder/userfiles/files/vuxupakuk.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16085b10372a0f---58653073950.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/bijudadikarukujomo.pdfIn PDF document text
    • http://fotocaroli.it/userfiles/files/razazakawitizu.pdfIn PDF document text
    • http://hanasushipickup.com/uploads/files/dupitaguvapetorutas.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/e29c1cec05fad57bf3e7a44f7f901e8e/kurubal.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=what+chocolates+used+to+be+in+rosesPDF link annotation
    • https://www.rt9.rspo.org/ckfinder/userfiles/files/wunapobavemujezinebikubad.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_off0000f2de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DE 10700 bytes
SHA-256: 1f48888125d4eb67ffc08694bcfb402a6caba0861c332da33b2ca3c24302f972
font_01_sfnt_off00010b60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B60 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12372 17904 bytes
SHA-256: 2f4a7150efa39c5d89555d51c36d7b455f077cabde45ad9113c930696780c771

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