Malicious PDF — malware analysis report

Static analysis result for SHA-256 2075f8169df8e8a5…

MALICIOUS

PDF

83.2 KB Created: 2021-07-31 04:18:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 3b649066f52ffca4e847fd879fd74861 SHA-1: 065bf32b730d97540b4d30c1661089eebde0fb5b SHA-256: 2075f8169df8e8a56bf04852d025b849565bc4d583db5685da58012d2d843947
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting. The ClamAV detection 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' strongly suggests a phishing or trojanized document. The embedded JavaScript likely facilitates the redirection to these malicious sites, which are structured as a link farm.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3976

Heuristics 6

  • 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
  • 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=fast+and+furious+full+movie+subtitle+indonesia+download PDF link annotation
    • http://crm333.com/documentos/file/vozexunanugolobusopeb.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160798fe55b6c3---28720800549.pdfIn PDF document text
    • http://fincasotilloviejo.es/files/sotillo/_repo/file/67553100242.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160844af6b883d---fitujama.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/0af9f8f9d95cbe6be53e2110a8b6db0b/bakolumasoledelexufep.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/jgmujaloavgbgeenvoteigbkt4/kogekibenusamomipax.pdfIn PDF document text
    • http://tranhdaquydep.vn/upload/files/podefopukubin.pdfIn PDF document text
    • http://rhondachem.com/d/files/zereg.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/5375a1f147a46136ed21f9ea627a1250/nejikivogufujezovesa.pdfIn PDF document text
    • http://shiinamotors.com/js/upload/files/radajasarepiregiwitaju.pdfIn PDF document text
    • http://michianaorchidsociety.org/clients/2/28/2832e32407c795c8d28ffe68102aa18e/File/semafifedizipalol.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/iqsoi40llgkg1156mjfsnrqtb2/rujarisigabut.pdfIn PDF document text
    • http://agapetown.net/ckfinder/userfiles/files/xenamutelinerilupodiw.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed887fe858b---janifizixugifoposekepej.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/gigaxidepeduzigipasotiv.pdfIn PDF document text
    • https://activepymes.com/pub/file/rozejozilarafojiluvobuv.pdfIn PDF document text
    • https://ctners.com/ckfinder/userfiles/files/31086947533.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/g06s8jmdbuikkd805n17v2sh1p/kejaxejozuxidezije.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/8f092c9ec7601ec80c048e3cab6bf85a/73125112674.pdfIn PDF document text
    • http://sorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/78088008448.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a7a0be0b3---34551290160.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1607e502fea69f---gewadopezakoratotiva.pdfIn PDF document text
    • http://starrsgazette.com/admin/images/file/gigokatixubodafunageviziz.pdfIn PDF document text
    • http://innovatepc.com/userfiles/file/mulorurularufawajajexo.pdfIn PDF document text
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/994d684068bfd6c11f22a2cfa7cbd31c/58880267944.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/m5rdjvtb683digpcrodqc7qi97/vovumom.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB66 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001137d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1137D 10884 bytes
SHA-256: 3992135a9a72c6521f9a07f91a7f1db7feb3bb6f01069891edf2a205fc2dca8f

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