Malicious PDF — malware analysis report

Static analysis result for SHA-256 daaf07c2dbbfe4c3…

MALICIOUS

PDF

71.7 KB Created: 2021-07-16 04:10:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: 501d955b5f3c8f1884d146b6276fb6f8 SHA-1: c0c9a2333030ede1eecc8d442a0710696d792248 SHA-256: daaf07c2dbbfe4c3ab3ac3d212dd723ef96a7cb79184d5902cc3d3f0bca7148e
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a link farm pointing to numerous domains, many of which are hosted on compromised CMS uploads or disposable hosting. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a malicious intent, likely to lure users to phishing sites or download further malware. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier clean score 0.2218

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://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1608239c5165b4---17910493176.pdf In PDF document text
    • https://betenrealestate.com/sites/default/files/file/64280519181.pdfIn PDF document text
    • http://vietthanhstone.com/images/news/file/kivoza.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160cb3e70297b4---4911440629.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/bopup.pdfIn PDF document text
    • https://cashcruis.ru/wp-content/plugins/super-forms/uploads/php/files/61083906b49300ee420a3c6f2b2d4ed4/varixovinefejuviva.pdfIn PDF document text
    • http://agisma.ru/files/pages/files/xebozekomogosojitegobuv.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/43586306083.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094b2a2bffb4---kerafibuwimejobi.pdfIn PDF document text
    • https://cardion.dk/gfx/fckimages/file/54877497353.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/f11114d8f8d6fb67b1105b6c2eb9999a/83964665702.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea72165d93---boxijawopuzerutejir.pdfIn PDF document text
    • http://kenzoum.org/home/integrity/public_html/ckfinder/userfiles/files/fasugajonumel.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///benagub.pdfIn PDF document text
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/d2d5986730b76f096b771b2794c90312/tegeluzel.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/5315345f2195495691803784971d26ac/3537989462.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/49533f8dabb1cd8b8d754f980d2eb215/53158585681.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dfe57e11ef---vepogikowixodapigix.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/41207703389.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f6894bf45c---70398992670.pdfIn PDF document text
    • http://wksx.top/images/userfiles/file/zidozaxojinerevoparuduku.pdfIn PDF document text
    • https://amoslodge10.org/ckfinder/userfiles/files/mikobawireberod.pdfIn PDF document text
    • https://naucharts.com/ckfinder/userfiles/files/modijedagewexufumir.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a64362d81f7---bagaridakusulutugepoled.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=the+ohio+constitution+of+1851+worksheet+answersPDF link annotation
    • 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_off0000c15d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC15D 15416 bytes
SHA-256: ca2ac6e4d639fa55b35778793cc9bfdc0c5be60968fd6f60eb81f0235cd7a49f
font_01_sfnt_off0000e8a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000100b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B9 11024 bytes
SHA-256: a58f7c3265d4398b0170bcf182ec874dabf9b4ae530dcb0872495b51fa9c7388