Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a09db922cd15fca…

MALICIOUS

PDF

63.6 KB Created: 2021-08-28 09:35:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0296e9e5dcad32acf4019dfab9555d29 SHA-1: 337806f817c75c759289e84c9d4491a5a4efedb1 SHA-256: 6a09db922cd15fcaad9f6b3475fe4f5dc35946b0691d16c1f2e68e104bb6162d
162 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript and multiple external URIs, indicating an attempt to redirect the user to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The presence of a link farm on compromised WordPress upload storage further supports this, as these are often used to host malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9429

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://www.champagne-auge-dascier.com/ckfinder/userfiles/files/sotekuwupejufokar.pdf In PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/796f61c3dfdf708d903329e6ff3c1dbe/23033981031.pdfIn PDF document text
    • http://industrialdevices.in/uploads/11295747567.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/wowiged.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/zikulepokumenedavanulope.pdfIn PDF document text
    • https://whitesal.com/data/images/file/6886_20210706073633.pdfIn PDF document text
    • http://www.cafeinca.com/img/public/contenido/file/89617865348.pdfIn PDF document text
    • https://carrieres-pierre.com/userfiles/file/ludexagaj.pdfIn PDF document text
    • http://ferrocom-spb.ru/userfiles/files/18681632571.pdfIn PDF document text
    • https://ytdrive.com/CKEdit/upload/files/warixuvolakawalipugasugok.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160a993ce64ae8---vizunedojoluxov.pdfIn PDF document text
    • http://sotel-perm.ru/site/file/nazudotopok.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16074d9fc73c9c---wivaxowojumemiguxixu.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160b18e4ac99b8---posifurofi.pdfIn PDF document text
    • http://garderoba.sk/images/_file/39214333873.pdfIn PDF document text
    • http://hart-metale.pl/gimnazjum/userfiles/file/balare.pdfIn PDF document text
    • http://ux-school.ru/files/files/jimifuwav.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075145e40103---53048417191.pdfIn PDF document text
    • https://aedwea.com/upload/foto/11470698798.pdfIn PDF document text
    • http://lucchetta.net/userfiles/files/55053171125.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a322bc6f8d1---wosazemiromijisedajekomav.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/561ae77297fc153225c9f844d19f83ec/femisabutexomutor.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/8cf88be5cafa1e08886f365bc6053c22/92001956949.pdfIn PDF document text
    • http://eldmsh1.ru/js/ckfinder/userfiles/files/69649695217.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/160994ac6beee3---47925861780.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=gestion+ressource+humaine+pdfPDF 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_off0000e98f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE98F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1