Malicious PDF — malware analysis report

Static analysis result for SHA-256 f378a6f2da29b03c…

MALICIOUS

PDF

106.8 KB Created: 2021-07-31 13:27:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 0382339a3a0d669b520de09f220713af SHA-1: a0270f2552bcb7269d14f47995764a82f027f59f SHA-256: f378a6f2da29b03c15d98426216aeb79560f70ad344fe20737d6aa4470701356
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many of which point to compromised WordPress upload directories or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The embedded JavaScript likely facilitates the redirection or download of further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6681

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 http://petersonspann.com/clients/3/32/32c4b2f41fa698b5b938e848169c8dcb/File/fizelevuzivexugideji.pdf In PDF document text
    • http://1yunnan.com/ckfinder/userfiles/files/riremubaf.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af85bce499f---guzukiv.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/40magt66o4mhqm599fb13nmphg/10779529233.pdfIn PDF document text
    • http://aurora-c.jp/files/files/14305012440.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e6eda1358c---5453076003.pdfIn PDF document text
    • http://joyear.com/ckfinder/userfiles/files/ratofu.pdfIn PDF document text
    • http://smartcevent.com/clients/871459/File/dotanubafig.pdfIn PDF document text
    • http://daieimotors.com/js/upload/files/35702335463.pdfIn PDF document text
    • http://sacoorhealth.pt/site/upload/file/fodisopixamalugovudexiko.pdfIn PDF document text
    • http://www.polni.si/Images/files/42748837009.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094fddcb1821---vuzisojeromanozixup.pdfIn PDF document text
    • http://brandweeramsterdamamstellanden.nl/userfiles/file/71012566033.pdfIn PDF document text
    • https://stbenedikt.ch/userfiles/files/tezoxadikutaliduwepepex.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a44c7361465---tajifebufavexoluvadusosu.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/0053d2142b7523e85a0c9921945c6381/89791581400.pdfIn PDF document text
    • https://topinsolventa.ro/userfiles/file/jekipuguwelubebe.pdfIn PDF document text
    • http://innospectrum.eu/hirlevel/file/pamidirafenexawemog.pdfIn PDF document text
    • https://heatingboiler.ca/fck_upload/file/goginosenonun.pdfIn PDF document text
    • https://djennebeads.com/nbloom/fckuploads/file/95174474078.pdfIn PDF document text
    • http://gancza.pl/userfiles/file/befapekixekesoni.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/m7djh38gjithv6g76qre6onef3/gefuvoxalinuzajagitiwefow.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/ef4d4e5e3addc6207e77249ba46c24eb/baninuxaxura.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=what+the+branches+of+psychologyPDF 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_off000180d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x180D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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