Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eed413bb79303eb…

MALICIOUS

PDF

81.0 KB Created: 2021-10-19 05:49:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: cc3150b8a6e1fde715bdc12734b8625f SHA-1: a2227cb840391ef872874580cc79380ccabb01c7 SHA-256: 6eed413bb79303eb683dd14e3a37c313e7aedc5edfe13617abed04b110d1f032
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to distribute malicious content or phish users. The presence of numerous external URIs and the 'link farm' heuristic strongly indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/de99c09cba14eb69e3c4cb4d36c816b3/jejaxarivizaxomonefitu.pdf In PDF document text
    • http://aal.tw/uploads/htmlupload/files/zoxekusovesumasifiviv.pdfIn PDF document text
    • http://bangiyaparishadtoronto.ca/bpt/editor/uploadfiles/22581174684.pdfIn PDF document text
    • https://impulsa.mantareys.net/uploads/plantillas/files/gemaxujurud.pdfIn PDF document text
    • http://adhdesign.de/userContent/files/20210917075418-fosububi.pdfIn PDF document text
    • http://jjburgerut.com/uploads/files/juvatefovodi.pdfIn PDF document text
    • http://discus-rus.ru/upl/file/nebekizejube.pdfIn PDF document text
    • https://edubox.mn/uploads/users/0/files/2358207141.pdfIn PDF document text
    • https://jnnjhansi.com/userfiles/file/14808424708.pdfIn PDF document text
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/70878643530.pdfIn PDF document text
    • http://www.bash.cl/media/file/82336342165.pdfIn PDF document text
    • http://www.omt.ntou.edu.tw/ckfinder/userfiles/files/10968217228.pdfIn PDF document text
    • https://www.nvsrolko.org/ckfinder/userfiles/files/71229740541.pdfIn PDF document text
    • http://easyhypermarket.com/userfiles/file/kukujavixuxofisada.pdfIn PDF document text
    • http://cdn.eagle.mn/uploads/userfiles/files/66933584539.pdfIn PDF document text
    • http://ifa-astrologie.de/userfiles/file/rojisunorasopibek.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161339e42749b5---4160252391.pdfIn PDF document text
    • https://jmbarrenetxea.soinuenea.eus/files/galeria/files/73654674890.pdfIn PDF document text
    • https://aletihad-group.com/userfiles/files/mibukawulijulilidoxiwofiw.pdfIn PDF document text
    • http://ccsilver.kr/files/fckeditor/file/611404991615b094b917ce.pdfIn PDF document text
    • http://lutechmed.com/Images_upload/files/49321208439.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/idrs9350ph5fsk26lojcclk02u/76268274235.pdfIn PDF document text
    • http://slsnn.ru/content/file/84547863292.pdfIn PDF document text
    • https://tumsad.org/img/editor/image/file/dozojorelapolebumufod.pdfIn PDF document text
    • http://tuclubcr.com/campannas/file/39769402503.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/EqozwcbAC44/uplcv?utm_term=candy+crush+jelly+saga+free+download+for+windows+10PDF 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_off0000d624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD624 17528 bytes
SHA-256: 311469ba377d2433b0faf759ee5838d2c516cf1cf2fa0074ce0b52540590d027
font_01_sfnt_off0001039f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1039F 11292 bytes
SHA-256: 6b1514fa3ce2b79f171ef25cddd4ebec97cffa8e2112bd1532a3a84ff269f352
font_02_sfnt_off00011df9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DF9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1