Malicious PDF — malware analysis report

Static analysis result for SHA-256 938a48c38cc8c648…

MALICIOUS

PDF

77.6 KB Created: 2021-07-20 13:49:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d8dff88d1e173ac0d675fa814340c3a3 SHA-1: a4a137eaf56b79f3a3f283ed45d4369e2d6f3ddc SHA-256: 938a48c38cc8c648df0904a99af5c872ef2c4985b46d76d38f786612d0c8f2f5
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous links, many of which point to compromised WordPress sites and are structured as link farms. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The file's primary function appears to be directing users to potentially malicious or phishing content hosted on these compromised domains.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3127

Heuristics 5

  • 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.
  • 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://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e3f680c4bb---56817340472.pdf In PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/ab9c73ad3def291f30fb84fb4bdfcd57/13277365304.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/9p0a5c0vkml9gft5g2cagc4b74/konunaze.pdfIn PDF document text
    • https://muachungbaohiem.com/uploads/userfiles/file/37986048745.pdfIn PDF document text
    • https://nbtele.com/en/cache/fck_files/file/kepazamukamu.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160831c3a0f645---19319717993.pdfIn PDF document text
    • https://travelsafeway.com/userfiles/file/motigokima.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/34518166374.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/41744175ee3aa563b72c96fa09c84883/39693784682.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/9f536b248e25fbc5813079a06f3b6c79/31995005616.pdfIn PDF document text
    • https://catbasailing.com/upload/fck/file/sopazobuvifutixiwozetiz.pdfIn PDF document text
    • http://andreaslasnik.com/data/files/werijavefedoz.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/6968559ab411bc711209f7c2258b7dcd/sunemanuvefed.pdfIn PDF document text
    • https://nadinerogger.ch/userfiles/files/60976543045.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd6a6faeef4---11622299242.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/fc69e37d3856c3b0b0e4f0922ce2ebec/lilixixujapusivesulesebu.pdfIn PDF document text
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/bjb8m61pc3t9do1kbgn4c7oq37/91864789481.pdfIn PDF document text
    • https://dbjadow.pl/attachments/file/62063164586.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/c23c8e1a021ba8f08b58871da04cd4f5/rizudifagaxuwi.pdfIn PDF document text
    • https://taperagi.com/contents//files/72765533747.pdfIn PDF document text
    • http://aydinservis.com/ckfinder/userfiles/files/54922890407.pdfIn PDF document text
    • http://haisushitogo.com/uploads/files/1611869457.pdfIn PDF document text
    • https://maturana.cl/upload/file/13164713325.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/g9v7eurafdofbkg7kl2llc5sjl/50540888529.pdfIn PDF document text
    • http://savoie-outils-coupants.com/ckfinder/userfiles/files/77718622390.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160812441745d2---makubibisemugozolosak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=damn+all+this+beautifulPDF 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
stream_002_off0000e2e4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xE2E4 16244 bytes
SHA-256: 9229bde5e3614c940ebb387a6affb910e6b09cdb82f6b0ab59768fbd23138caf
font_01_sfnt_off0000f8d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1