Malicious PDF — malware analysis report

Static analysis result for SHA-256 60d0d7795c4c5aa2…

MALICIOUS

PDF

81.2 KB Created: 2021-09-04 06:02:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: bf6eec2d33159fcdf46db9270235ad86 SHA-1: e063c258cde2977b6760915b7f1e5ff919ff463e SHA-256: 60d0d7795c4c5aa2fa94fb2ec0771bf11db68c960c22f49e3181928affcf4eb3
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and a significant number of external URIs, many of which point to disposable hosting or compromised WordPress sites, indicating a link farm designed for malicious redirection. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cmtdental.com/upload/ckimg/files/gipotofoxutiguxitefo.pdf In PDF document text
    • http://www.jacenter.org/js/ckfinder/userfiles/files/dabuduteses.pdfIn PDF document text
    • http://associazionemillesogni.it/userfiles/files/suzopetukutazonaxopitoze.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/nurazexizi.pdfIn PDF document text
    • https://dienlanhhonganh.com/images/pic/file/16491403068.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/a8rfacn9vp5ds17qdue4d0l2tn/88303737847.pdfIn PDF document text
    • http://vp-dmsh.ru/admin/ckfinder/userfiles/files/4149588538.pdfIn PDF document text
    • http://meadescafe.com/userfiles/file/wosusakubatufiwuta.pdfIn PDF document text
    • https://manenshop.com/upload/files/35466898755.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608816b7645af---70541008185.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16080356305a66---zakulezur.pdfIn PDF document text
    • http://ugrctrani.it/userfiles/files/32693788892.pdfIn PDF document text
    • http://otoozevran.com/resimler/files/kitiwiw.pdfIn PDF document text
    • http://air-ned.com/uploads/files/97435384523.pdfIn PDF document text
    • https://nslogisticservice.com/userfiles/files/98064567644.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16095596f64652---85526380836.pdfIn PDF document text
    • http://magic-mugs-factory.com/uploadfile/files/godivasuviwimixem.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/f2f9ab4df3e9074c6e75104c50c52527/88040614214.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c2283f34b5f---javaritemokis.pdfIn PDF document text
    • https://lifo-sea.com/ckfinder/userfiles/files/nikivej.pdfIn PDF document text
    • http://kenzoum.org/home/integrity/public_html/ckfinder/userfiles/files/lezurejopepon.pdfIn PDF document text
    • http://ylgems.com/file_media/file_image/file/mobotepofofuzat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=reinforced+cement+concrete+design+book+pdfPDF 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_off0000d622.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD622 11032 bytes
SHA-256: 356bf823c8d89a63d1c568f53d2cc72633a39abaa7a1fc4fdc74eeeeafe4fe7a
font_01_sfnt_off0000ef61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF61 18348 bytes
SHA-256: 10ff711137249b1ae3acde3450147fc1de6f96a0032a4e6318cadba3652edacf
font_02_sfnt_off00011e83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E83 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1