Malicious PDF — malware analysis report

Static analysis result for SHA-256 0994954ef16cff50…

MALICIOUS

PDF

83.7 KB Created: 2021-09-20 04:58:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 112d159d23941b5a656ab9af1c25cd65 SHA-1: 1953e57afa6653c4538c8307a3f16f04ec36406b SHA-256: 0994954ef16cff50facf97ea9181efadb96ed5521eead73ca344e1eeda5d52c2
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and a link farm pointing to compromised WordPress upload storage, suggesting an attempt to deliver a malicious payload. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://huntic.ru/uplcv?utm_term=mgr+magan+full+movie+download+kuttymovies PDF link annotation
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/8iu3j7dh49h6rstn1417f8g805/93326537794.pdfIn PDF document text
    • https://pacientes.quiroser.com/UserFilesQUI/file/fifitifabotowusukifezaga.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/5ddc324bfa7e43742949fc0167a73060/loxuxasitixeji.pdfIn PDF document text
    • https://mcq.bmtinhoc.vn/InteriorWeb/images/images_news/files/93923928934.pdfIn PDF document text
    • https://sergeca.com.ve/ckfinder/userfiles/files/8496812285.pdfIn PDF document text
    • http://4darchitecture.org/img/all/zutulufopemawinuwa.pdfIn PDF document text
    • http://kaushalacademy.org/ckfinder/userfiles/files/13051976854.pdfIn PDF document text
    • http://globalsublimation.net/uploadfile/files/30101373868.pdfIn PDF document text
    • http://quangcaosms.org/media/ftp/file/33857353955.pdfIn PDF document text
    • https://minervatech.work/js/ckfinder/userfiles/files/13425589885.pdfIn PDF document text
    • http://car-zone.sk/data/data/file/6765634650.pdfIn PDF document text
    • http://zabbeleecooking.com/ckfinder/userfiles/files/92641453301.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/99e5ffb4d4fdc539031353c094dba2a7/83332487569.pdfIn PDF document text
    • http://montoaneli.com/ckfinder/files/6553503973.pdfIn PDF document text
    • http://vip-cond.ru/userfiles/file/83210641049.pdfIn PDF document text
    • https://tjp2-hotlink-j3t.com/contents/files/vatenewegujulumix.pdfIn PDF document text
    • http://kleinschadenexpert.com/userfiles/file/buzigosakufodugo.pdfIn PDF document text
    • https://efnnma.org/files/file/wewusobew.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/16136f1c859c1a---wuvidovepibojolesepilod.pdfIn PDF document text
    • http://koyomisushi.com/uploads/files/tejekiw.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1613fdb1c1094a---jevur.pdfIn PDF document text
    • http://sumisaedu.com/FileData/ckfinder/files/20210905_4A7C054C888C9414.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614160346eaa8---xizaboguduwipomomabawex.pdfIn PDF document text
    • http://hichipper.com/hichipper/uploadfile/file/2021090101015873499.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_off0000e171.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE171 11148 bytes
SHA-256: d360d02714476edd3bdca1bb7b7841e4d4aea10178ce02deca515a3959fb1a02
font_01_sfnt_off0000fb59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB59 17724 bytes
SHA-256: 8c17e7e33eb90f2de9042b17c822fe6edfa52ecc7deef1cc954aaf596f65300f
font_02_sfnt_off000128bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1