Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ee717ebb694ed9f…

MALICIOUS

PDF

103.8 KB Created: 2021-08-09 17:55:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 1cbd9fecfca38c46ee39d7c289ee9e7a SHA-1: 1c9f084cd1ca488764eba8f572af33a646073014 SHA-256: 3ee717ebb694ed9fa3cfe4ac2451f31d669c06139f0df202d02c6ab96d735310
164 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.
  • 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 http://staceyasp.com/UserFiles/file/48289802887.pdf In PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/8mhcgtm2hrd4sathvogo66fqa8/divedasiraxe.pdfIn PDF document text
    • http://labcoop-jsc.com/wp-content/plugins/super-forms/uploads/php/files/1bht0ur66fai8k0fiaia04jeqv/81212144902.pdfIn PDF document text
    • http://promador.pl/userfiles/file/lawozisumol.pdfIn PDF document text
    • http://akpanlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/64050197831.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c572788c1ba---34398393809.pdfIn PDF document text
    • http://studiotecnicomartani.eu/userfiles/files/15025351461.pdfIn PDF document text
    • http://arcadia1973reunion.com/clients/3/33/33cb7023d77084166ed027ca16b579b7/File/77435916120.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/3tfu65985lbjls3jj8basgmnkv/85187559861.pdfIn PDF document text
    • http://partnerplus30.ru/images/fornews/files/78285554342.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/ah5fpenvfjl6iss8181ahtmah8/21904015090.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/6910c39077c7d3c3d8b60e5e1e9a6c32/59303920831.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160daece937d33---39767160304.pdfIn PDF document text
    • http://ebslang.net/_UploadFile/Images/file/jobepobawulugoxix.pdfIn PDF document text
    • http://mottaing.eu/userfiles/files/muvewame.pdfIn PDF document text
    • https://eksiliotomotiv.com/upload/ckfinder/files/xotezotagiwaned.pdfIn PDF document text
    • http://zajazd-broadway.pl/galeria/file/rumez.pdfIn PDF document text
    • http://klefmarken.se/upload/file/pipoxunilutalomo.pdfIn PDF document text
    • https://k-barrierfree.com/FileData/ckfinder/files/20210625_6729051F81853159.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/61471959104.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/wodiwadadibawowume.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161004c8645234---fizota.pdfIn PDF document text
    • http://bike-aholic.com/UserFiles/file/55546807042.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=batla+house+full+movie+download+filmy+wapPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11951 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13162 16148 bytes
SHA-256: d9084a348e59186527e836a31dbcf7282e5559873d90f75c33cb356c8040fb80
font_02_sfnt_off000146e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146E8 11084 bytes
SHA-256: c9569e77eab2eef3f2f8ff23c18cc3fb3190fcf80256e125c51bde9ff2efafa8
font_03_sfnt_off000160ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160AE 18012 bytes
SHA-256: df495312998b8994893ef2b9cae70016d8791115b32ff79cb8c61650e8284915

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