Malicious PDF — malware analysis report

Static analysis result for SHA-256 32db7c3b403948cf…

MALICIOUS

PDF

82.1 KB Created: 2021-09-16 04:55:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b4d3f87463c725f7ded7522947667590 SHA-1: 7f6a23cb74b9dd5de2e3a21f6851fc82b589ba50 SHA-256: 32db7c3b403948cf7109359b1bc23545bb0efa73672109830b736233fdee5122
232 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, including links to compromised WordPress sites and disposable hosting, suggesting it's part of a phishing or malware distribution campaign. The presence of heuristics like 'SE_BROWSER_INSTALL_LURE' and 'SE_DOWNLOAD_BUTTON' indicates a social engineering attempt to trick the user into installing malicious software or extensions. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 10

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://ketchas.ru/uplcv?utm_term=how+to+download+play+store+on+a+chromebook PDF link annotation
    • http://www.ciesol.es/ckfinder/userfiles/files/24949808967.pdfIn PDF document text
    • http://www.dagmarsvendova.cz/admin/js/ckfinder/userfiles/files/vikatogewixamed.pdfIn PDF document text
    • http://slxiang.com/v15/Upload/file/20219152154552243.pdfIn PDF document text
    • http://dymenahealthcare.com/upload/fckeditor/file/mesulode.pdfIn PDF document text
    • http://perechen-jurnalov.ru/js/ckfinder/userfiles/files/12372985516.pdfIn PDF document text
    • http://zuszdounky.cz/files/xobuluwugokogigisape.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/45757926092.pdfIn PDF document text
    • http://opakowania-loga.pl/zdjecia/fotki/file/veruvovo.pdfIn PDF document text
    • http://www.dialog-seversk.ru/jsplugins/ckfinder/userfiles/files/41553474045.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/userfiles/file/45713573708.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/161413c81e8be7---zapomisek.pdfIn PDF document text
    • http://elazentrale.de/images/uploaded/file/50153513977.pdfIn PDF document text
    • https://sdhouse.info/ckfinder/userfiles/files/58172032554.pdfIn PDF document text
    • https://didacostruzioni.it/userfiles/file/74244996588.pdfIn PDF document text
    • http://ylgems.com/file_media/file_image/file/13124678810.pdfIn PDF document text
    • http://xn--3e0b556bhrbowi6undva.com/ckupload/files/wukiwepofabukaku.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614223c9ac095---71635294823.pdfIn PDF document text
    • http://barrybusiness-crm.com/ressource/devis-photo/files/84900548492.pdfIn PDF document text
    • https://monamifrance.com/FileData/ckfinder/files/20210904_6F43911B526BD281.pdfIn PDF document text
    • http://xn----1-6cdapb2bdyqawnpcindqfc.xn--p1ai/media/file/14152333539.pdfIn PDF document text
    • http://cee1968.com/ckfinder/userfiles/files/xededova.pdfIn PDF document text
    • http://ambulatorioveterinariocamali.com/userfiles/files/82256883198.pdfIn PDF document text
    • http://a-xian-coat.com/uploads/files/202109082255208509.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e1a10f0247---86825122053.pdfIn PDF document text
    • http://heathrowairporttaxi.website/userfiles/file/60990826668.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16130dbb03dbc2---21718283662.pdfIn PDF document text
    • http://puntolinea.org/userfiles/files/81313587864.pdfIn PDF document text
    • http://cqhuaan.myhost360.cn/upload/files/09-06-17-12-46-87.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_off0000d9ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9BA 18028 bytes
SHA-256: a215c65705e7f163969fb51ce1a2db4d2dc0b086b9943a87f3e2b9aef898d64f
font_01_sfnt_off00010872.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10872 11112 bytes
SHA-256: 5842d414191edc27ee591069c377d43d6ba30275d20259f926dd6ebe07699afa
font_02_sfnt_off00012207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12207 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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