Malicious PDF — malware analysis report

Static analysis result for SHA-256 c01221f8ebed933c…

MALICIOUS

PDF

63.7 KB Created: 2021-09-03 07:49:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 8d13abe9d1695b64e3e61eeb3adeee25 SHA-1: ec8b1e72124813ff9907e8d1dfd48c175b508387 SHA-256: c01221f8ebed933cb73a59b4a0a6e1e86ff30cec24269c3420db9bd6a9765f0a
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded JavaScript and a large number of external links, many hosted on compromised or disposable domains, suggests the document is designed to redirect users to malicious sites or download further payloads. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically points to a link farm strategy on disposable hosting, reinforcing the phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5661

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=had+better+and+would+rather+pdf PDF link annotation
    • https://dacinsara.ro/fckfiles/file/89511042326.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5d82a30e8d---30917904469.pdfIn PDF document text
    • http://5lovestartw.com/CKEdit/upload/files/51552547140.pdfIn PDF document text
    • http://fixmyhelicopter.com/project-new/christianbook/upload_images/file/xamusaxuxilixemewo.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/c966ad46c843850d3f1aa2ef71db9326/sejogivegisoribemamogiguz.pdfIn PDF document text
    • http://www.sictombbi.fr/ckfinder/userfiles/files/92529342756.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607450754b280---22188251419.pdfIn PDF document text
    • http://bezagsecurity.cz/userfiles/29230314621.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160722be0cc5e6---pusotodewinugobifi.pdfIn PDF document text
    • https://austarpharma.com/upload/files/muwomunedofizujakujed.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/20672645545.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/ffaf3ba2b2251913fa775d5412a48073/mufalusawulox.pdfIn PDF document text
    • http://dspec-car.com/js/upload/files/63920985217.pdfIn PDF document text
    • https://taichielite.com/louis/taichi/ckfinder/userfiles/files/dutasuxerawomolole.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/83c93a53b4383a493343d9f47da1a0af/joripopebirasusosom.pdfIn PDF document text
    • https://mtmhomeschool4art.com/mycms/uploadedimages/editorUploadedImages/file/letoxapuzi.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/99c4e6ab62e3a15bba8f38055a106892/85036126335.pdfIn PDF document text
    • https://angelsstaff.com/uploads/file/nizarujobakumup.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/acb3e2cd704400e44c5b812f1d55579c/61927712041.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/2296216c5683afe60f1ed36d7ad16aca/76803420345.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160711f8bea3ee---95080551269.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/f2b6d59c0e6a293a4f162d8d29025b44/funakapukivijewolopesa.pdfIn PDF document text
    • http://www.abcklima.hu//data/editorfile/dojuniloro.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_off0000ba40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA40 10652 bytes
SHA-256: 45a20e13c2967c93c1bdcc8a5a9535ab618e72f34de493e197c34ba9f645447a
font_01_sfnt_off0000d257.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD257 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1