Malicious PDF — malware analysis report

Static analysis result for SHA-256 4891dd21a8a65242…

MALICIOUS

PDF

62.3 KB Created: 2021-09-27 05:02:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b79b4b5ad3fb631f1b35badac76f3a5c SHA-1: 650d029affc45f3e7bc2ed84d4e20d7a7b21fe6a SHA-256: 4891dd21a8a65242b8274a65f0c24a103a8ffb34ce618afd0f9594eada9eab52
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is often used to redirect users to malicious sites or download further payloads. The heuristics indicate it's a link farm on disposable hosting, with one URL pointing to a raw IP address, suggesting a phishing or malware distribution attempt. The ClamAV detection as Pdf.Phishing.Trojan further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4450

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://fasson.vip/images/editor/files/puwededemaxebejovozikig.pdf In PDF document text
    • https://polenhosting.com/calisma2/files/uploads/44384697994.pdfIn PDF document text
    • http://battlegrouponline.com/app/webroot/js/ckfinder/userfiles/files/kudasewinetevabuk.pdfIn PDF document text
    • https://happycolaborativo.com/uploads/files/73067419617.pdfIn PDF document text
    • http://neonatal-surgery.ru/userfiles/files/zibulapegorekobivapeva.pdfIn PDF document text
    • http://career-id.org/ckfinder/userfiles/files/78372583018.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1614ceef785c2a---zulexamexesafaxalox.pdfPDF link annotation
    • http://risorsaterra.it/userfiles/files/32545738538.pdfIn PDF document text
    • http://incomingmakedonia.com/files/files/watefoxudef.pdfIn PDF document text
    • http://elitk.ru/_files/gevugiferatitoloze.pdfIn PDF document text
    • https://bhiringisamsankalimandir.org/userfiles/file/30432363621.pdfIn PDF document text
    • https://learningsolution.ca/userfiles/files/41197891178.pdfIn PDF document text
    • http://www.tivafa.hu/upload/file/35424893604.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/6da16678c38c9044ce4998dad0dae4ae/74557247011.pdfIn PDF document text
    • https://locoffice.ru/userfiles/file/zivodovezovosipux.pdfIn PDF document text
    • https://dreamscapes.ca/dream_scapes/userfiles/files/bizefezawudidezotuzol.pdfIn PDF document text
    • http://enotecagaribaldi.it/userfiles/files/99354939029.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/bgj1irdkgq7k5h1uugft1ji3hv/suxema.pdfIn PDF document text
    • http://humidorio.de/ckfinder/userfiles/files/54716281932.pdfIn PDF document text
    • https://sausalito.com/wysiwygfiles/file/3607340731.pdfIn PDF document text
    • http://www.atsamuihaus.com/image/upload/File/muris.pdfIn PDF document text
    • http://asorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/59046365083.pdfIn PDF document text
    • http://kabaretyimpresariat.pl/Upload/file/5277760243.pdfIn PDF document text
    • http://xn--12cbg9dihj7egda2g6a7dceb1d2cp4nvgf4f.com/datas/files/xoritemutexajigomerulati.pdfIn PDF document text
    • https://istanajp2.com/contents/files/21993473551.pdfIn PDF document text
    • http://farmina.ru/uploads/files/rutazorivufinaduzepuros.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=free+download+minecraft+java+edition+apkPDF link annotation
    • 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_off0000b962.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB962 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD174 17304 bytes
SHA-256: b13e2fbcf14b320c761efd05328cc4484d4408e59e027efae66d2fe0abeb4895