Malicious PDF — malware analysis report

Static analysis result for SHA-256 baf02c1c0e4f3c8b…

MALICIOUS

PDF

76.9 KB Created: 2021-09-20 17:59:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: b56f82f0216df278f28704de42809dde SHA-1: ededa32d6f5a6716fbbd1042e80f427d38ba60fe SHA-256: baf02c1c0e4f3c8b71ef0bd3e84ab80ca5f5bf1112e14a1e81190112f78431a1
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, a common technique for executing malicious code. Heuristics indicate the PDF acts as a link farm, directing users to multiple external URLs, some hosted on compromised CMS uploads. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • 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.
  • 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://webinaris.biz/ckfinder/userfiles/publics/files/mugiwafij.pdf In PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/1613e04423e45a---29820066679.pdfIn PDF document text
    • https://gencatakan.com/upload/file/75695555028.pdfIn PDF document text
    • http://protetyka-lublin.com/images/wyswig_images/file/negezapifamidusudiraser.pdfIn PDF document text
    • http://xn--80aguejfegacgj0ad.xn--p1ai/pict/file/manuj.pdfIn PDF document text
    • http://abnicum.ru/files/file/69983897575.pdfIn PDF document text
    • http://musicpark-live.de/userfiles/file/jasiwiw.pdfIn PDF document text
    • https://questyme.ca/userfiles/file/sabozejiwemarewikararibo.pdfIn PDF document text
    • http://liveisagenix.com/ckfinder/userfiles/files/69114407032.pdfIn PDF document text
    • http://www.portaldasfreguesias.com/portugal/vianadocastelo/vianadocastelo/geraz_do_lima_sta_maria/ckeditor/ckfinder/file/zepufufu.pdfIn PDF document text
    • https://blv.by/upload/editor/files/6958827175.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/8b9cffa392614f898c24dff789b23507/pojogitivapoxalofofixukid.pdfIn PDF document text
    • http://aranysolyomfeszke.hu/editor_up/guzenajoxomabekonavo.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147397567d97---28903303318.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613807e29c080---wokapurowovonovazunux.pdfIn PDF document text
    • https://kristinanamaste.eu/files/42997487176.pdfIn PDF document text
    • http://tokyoracing.hu/userfiles/file/bezulunaragakidobekono.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143201410f01---morupep.pdfIn PDF document text
    • https://pacientes.quiroser.com/UserFilesQUI/file/folaniluz.pdfIn PDF document text
    • http://bsa-billiard.by/images_from_html_editor/file/fujeraviporezegomokifulax.pdfIn PDF document text
    • http://maduraicaterers.com/app/webroot/js/ckfinder/userfiles/files/xabavoli.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/161312567e10c6---77471684549.pdfIn PDF document text
    • https://centrumschoolka.pl/photos/file/bubakelevagap.pdfIn PDF document text
    • https://smartcirclegroup.com/userfiles/file/34124302447.pdfIn PDF document text
    • https://jungleflightchiangmai.jungle-flight.com/Uploads/files/69723050065.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+delete+text+message+on+androidPDF 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_off0000c8c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8C8 10768 bytes
SHA-256: e5ae34d927428de93214a4d8c57dce9251a6c52a6edabd4b01318c649e68a165
font_01_sfnt_off0000e155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE155 17400 bytes
SHA-256: 8768b8d3d2f9c285e58dd577698f59e300b1bee3fe4f134ca5b6dc5cbfb97545
font_02_sfnt_off00010db3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1