Malicious PDF — malware analysis report

Static analysis result for SHA-256 00694732f4c67202…

MALICIOUS

PDF

112.9 KB Created: 2021-09-20 19:30:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: dcf50e49bb68fe126831126b981e7f1b SHA-1: a8023d93b6392e1bff763a527b4c2aa8f6a8e90a SHA-256: 00694732f4c67202666be7f7462dbb028108e258e4adb1d094987a726eb69846
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and multiple external links, some pointing to compromised WordPress sites. Heuristics indicate a lure for password-protected archives and remote support tools, suggesting an attempt to trick the user into executing a malicious payload. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9877

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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.
  • 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://www.gonouvellezelande.com/files/21765684079.pdf In PDF document text
    • http://chieusangducphat.com/uploads/userfiles/file/gujedelaz.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ee18955378---32190395654.pdfIn PDF document text
    • https://krantiservice.com/ckfinder/userfiles/files/94282349354.pdfIn PDF document text
    • https://gmnavarra.es/ckeditor/files/tizirasezitelanirevis.pdfIn PDF document text
    • http://coimbrasoftware.hu/images/uploads/files/pofakabazowewipatogap.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16132d9411da28---vetomofipiriwuvu.pdfIn PDF document text
    • http://szyuangang.com/UserFiles/file///xasizadisojotuxuj.pdfIn PDF document text
    • https://liur-krd.ru/userfiles/file/paketazit.pdfIn PDF document text
    • http://canadapremiumlubes.com/survey/userfiles/files/30246672.pdfIn PDF document text
    • https://livermore.com/wysiwygfiles/file/wamixuka.pdfIn PDF document text
    • https://sporyolu.com/resimler/files/16787745324.pdfIn PDF document text
    • http://garagehayashi.com/js/upload/files/zurilosisot.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/2j07diho0fet936083vq1qs36v/13431292133.pdfIn PDF document text
    • http://energy-labels.com/userfiles/file/viziralexedo.pdfIn PDF document text
    • http://www.sana-anong.com/ckeditor/ckfinder/userfiles2/files/mafoso.pdfIn PDF document text
    • http://zentrumok.com/userfile/files/51551818621.pdfIn PDF document text
    • http://synergienetwork.net/userfiles/file/borusemuzuto.pdfIn PDF document text
    • http://doctour.hu/uploads/ckfinder/userfiles/files/5124464100.pdfIn PDF document text
    • http://bamboomfi.com/htdocs/cljr/data/files/teterovoliwivisikaxoro.pdfIn PDF document text
    • http://veraschwemmle.de/fckdata/file/patofoveti.pdfIn PDF document text
    • http://bestapp4u.com/admin/uploadedfiles/file/886178552.pdfIn PDF document text
    • http://cameragiaminh.com/upload/files/wurajow.pdfIn PDF document text
    • https://walkandsmile.com/userfiles/file/15622255901.pdfIn PDF document text
    • http://oshcongregation.com/userfiles/file/17289326248.pdfIn PDF document text
    • https://toocapen.com/files/fawipu.pdfIn PDF document text
    • https://equalitas.es/userfiles/file/93821616712.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=mtk+dongle+crack+downloadPDF 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_off000149ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000161c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161C3 10456 bytes
SHA-256: c5c25a711a8b85e1bebbba3459ca2b2643d9d747b7b83ee1325dccd1e21e6b44
font_02_sfnt_off0001797e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1797E 22952 bytes
SHA-256: 65a0f209d0da1646320790d6b7b55a40d907f2ee8e401fa9eb84654dd5bd730b