Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbfabaf19351bc0a…

MALICIOUS

PDF

73.5 KB Created: 2021-07-25 11:06:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 776b02d4ad4f3d8fd8b97207612c0ebb SHA-1: ba000ca71b6423d27f066e97645a75e03951f64c SHA-256: dbfabaf19351bc0ace415b3c45deb8d6f6d9a2121d524bb7db3c02127a7c44d2
154 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised WordPress sites or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure itself is the attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7635

Heuristics 5

  • 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.
  • 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 http://cecev.com/stockages/files/60976761948.pdf In PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16084b36f226c9---powuju.pdfIn PDF document text
    • http://beateromer.com/bilder/file/jolupe.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/538afab9d5a029d83c405bf7f47c6413/wovewesolofix.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc235af716---77857163686.pdfIn PDF document text
    • https://soechi.net/userfiles/file/77797446104.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/frkm7e44f9ijo49cnv7kkdeg7q/56532162545.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/tnqrb84pektfui62jlt00shs15/joxofavumanu.pdfIn PDF document text
    • https://postelezmasivu-olomouc.cz/ckfinder/userfiles/files/51697804716.pdfIn PDF document text
    • https://kopari.hu/files/file/37695655647.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607905dbbce10---26977020575.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d004bd801---36897320588.pdfIn PDF document text
    • https://serwisnawigacji.pl/userfiles/file/57055439018.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160793beb3d08e---35835599360.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/a5801ea5de118c582ed7ea0315cbf0fe/14237193522.pdfIn PDF document text
    • http://wanyuantemple.tw/userfiles/file/5989124318.pdfIn PDF document text
    • https://bawaniint.com/ckfinder/userfiles/files/58782936360.pdfIn PDF document text
    • http://odpadykj.cz/UserFiles/File/9318710503.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/b55b5a6f772f3babb6e0efb4a35c9091/52997117542.pdfIn PDF document text
    • https://abhimaninteriors.com/ckfinder/userfiles/files/roforux.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/efb8992b5407d990ba97c6c9fda5ed99/79714884532.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/mejovoda.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/pmtr2rf8nc5scn65glkiq7d218/fabofuvovovuto.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=12th+tamil+don+full+guide+pdf+free+download+2020+to+2021PDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA7 11160 bytes
SHA-256: 3f7b059c6879aca87a9d417d02ef862b2c498974f58a0cfb00018cd0032d2c98

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