Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed41fdf85e70c340…

MALICIOUS

PDF

86.6 KB Created: 2021-07-27 01:37:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 694697ab8ba818560a3fe877b30bd695 SHA-1: 5bbcbdef0d54a9199d380bf7c9ecace017699910 SHA-256: ed41fdf85e70c340c4392a1c80eefb4a84b7e8bf2c1c207845005aa0a3939e44
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, a common technique for executing malicious code within PDFs. It also exhibits characteristics of a link farm, pointing to multiple potentially compromised WordPress sites. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a phishing or trojan distribution intent, likely facilitated by the embedded JavaScript to redirect the user.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4722

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://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/8c2fa6eda8b3c015c30f06b7249261c8/45426656557.pdf In PDF document text
    • https://u-spot.biz/js/ckfinder/userfiles/files/besalabuj.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/41fe715e839424307a0f50f624811e4c/75356784517.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983fa24a4ea---nunubupowimefomadiduxupap.pdfIn PDF document text
    • http://bobhendrix-law.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/59042051939.pdfIn PDF document text
    • https://isleo.com/i_photos/file/zoruwuzisarexirufogijevax.pdfIn PDF document text
    • https://vibangnhadat.com/uploads/files/xajapamatoliguzaxegezin.pdfIn PDF document text
    • http://ledseoul.com/userData/board/file/penavodi.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/vejimawixofezasadal.pdfIn PDF document text
    • https://daismene.it/file/tixoremivu.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/7e158c3d4ef3233f1cfd14b475a68f9e/97653145031.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608a97fb1ee69---16381724164.pdfIn PDF document text
    • https://gilbertems.com/videos/file/5894100897.pdfIn PDF document text
    • https://grupo-kayros.com/userfiles/file/86866347720.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f7522d1e38---3555290593.pdfIn PDF document text
    • http://staropolski.net/Upload/file/vudosaxir.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/98d143b1baaf9347c0ae099c8aa5c3c7/madelaretuwive.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/85c35h72dgh41iijubvs3por27/ditotaxubadefunagut.pdfIn PDF document text
    • https://777mto.org/contents//files/zagopudorejekukivuropawe.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/f777g5k2hcq6iakj3qiae5rvo3/butezumofatabuwuza.pdfIn PDF document text
    • http://odontoflash.eu/userfiles/files/14541351694.pdfIn PDF document text
    • http://master-br.ru/img/file/gomavigebaf.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/49849959f57cf8529cd88c1737709490/folexikidiwenediwogimo.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/7dfdf4ea4bd453ec91bce7deef92bcdd/fujel.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=novation+v+station+manual+pdfPDF 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_off00011793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11793 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012fa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FA5 17488 bytes
SHA-256: ea34b1204f057f0ea5c57ca4aefab4ca69e96071014f3708ee3b004bdd33758e