Malicious PDF — malware analysis report

Static analysis result for SHA-256 e894a30806bbd340…

MALICIOUS

PDF

69.3 KB Created: 2021-09-25 19:24:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: c42c27759eeb4751a71335a227659871 SHA-1: a1d382d7cdbd47c27cce66dd487d9f8fe0532fbf SHA-256: e894a30806bbd340bedd878d84e43987a1b25131de82959103480df2a94b45a3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and numerous external URIs, many of which point to compromised websites or link farms. The embedded JavaScript likely facilitates the redirection to these malicious sites, which are then used to distribute further malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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 https://oniceh.ru/uplcv?utm_term=how+to+install+the+amazing+spider+man+2+on+android PDF link annotation
    • http://sk-massimo.com/js/upload/files/giritasemorib.pdfIn PDF document text
    • http://purplebyanki-com.bvirani.com/ckfinder/userfiles/files/68343853773.pdfIn PDF document text
    • http://drsuthichai.com/userfiles/files/fadewodunifepu.pdfIn PDF document text
    • http://wasserentkalkung.at/ckfinder/userfiles/files/pizoxexokanosoxenikupo.pdfIn PDF document text
    • http://ardeche.proximeo.com/ckfinder/userfiles/files/munofesuguxitemitudabo.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16147947b7cc41---31497515096.pdfIn PDF document text
    • http://videlec.be/ressource/file/36470786239.pdfIn PDF document text
    • http://nutronicltd.com/userfiles/file/namitedekenazosa.pdfIn PDF document text
    • http://flywings.sk/UserFiles/file/jofoxeve.pdfIn PDF document text
    • http://deleersnijder-bocaege.be/images/file/pijal.pdfIn PDF document text
    • http://spodne-pradlo-2bpoint.sk/UserFiles/File/30856710758.pdfIn PDF document text
    • http://idealhca.com/admin/images/file/48321639020.pdfIn PDF document text
    • http://fsgpj.com/upfolder/e/files/20210908060011.pdfIn PDF document text
    • https://pieseautocomenzi.ro/userfiles/file/77140084208.pdfIn PDF document text
    • http://casaledellasignora.it/userfiles/files/53422211826.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/39b48a5125cba7d82573e9b7c12aa39d/moruneposili.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161381885c9359---18896835624.pdfIn PDF document text
    • http://www.ppk-kp3k.kkp.go.id/ver2/extra/ckfinder/core/connector/php/media/ckfinder/files/63337615440.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/62935154397.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/32a0f824b0bc2467c77484aafe7a9b80/momodanipuragaxas.pdfIn PDF document text
    • http://spreewaldatelier.de/img/editor/file/95236402223.pdfIn PDF document text
    • https://argumentua.com/i/file/kowafog.pdfIn PDF document text
    • http://4els.ru/uploads/images/files/22351988214.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_off0000ada2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADA2 15260 bytes
SHA-256: 7021d7445f0dfccaa3652233644e6ffdb14da7c1dea34959f06fd11c2da4eadb
font_01_sfnt_off0000d3f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F7 11096 bytes
SHA-256: 7f0c02ae4c0384a9ab84a5e2c689ab6ef4ef3f33f190708932af1c7a722008da
font_02_sfnt_off0000ed79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED79 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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