Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d72806a8301939d…

MALICIOUS

PDF

91.5 KB Created: 2021-07-22 16:21:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 51303145e1e91b1e363318b97751231d SHA-1: 1e49d52885487ba2c06a7220db782895cee7926b SHA-256: 3d72806a8301939d2261fc6c4cdfdb4a7bce85a83d405bf2e965ea15a0083b5a
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link farm hosted on multiple compromised websites, suggesting an attempt to distribute malicious files. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports malicious intent. While no scripts were extracted, the presence of numerous URLs pointing to PDF files on compromised CMS uploads indicates a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier clean score 0.1534

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 http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c15027aa3ef---domeruw.pdf In PDF document text
    • http://wohingltd.com/userfiles/lijido.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/39bd2e463b3ad33c3ac24c518669814a/14946839599.pdfIn PDF document text
    • http://ithalattagarantibelgesi.com/resimlerfiles/32564258617.pdfIn PDF document text
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/a46c4c14cc9b77565b7efa91ab3df75f/73922372063.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/e20af86d2b6eb3e5149e85525e814c3c/dubivigexa.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/jutuka.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160af7165ce3a5---xatuwomekirafufi.pdfIn PDF document text
    • http://dotacjedlaoze.pl/userfiles/file/fezitoba.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/8017dbe96f69d656c55633ef33e31d75/43283661658.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/8hbpo8gnfu1iddrukmas3qovf4/19225910046.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/7shno4lrfamsp7chab5h1lnjhc/3182803767.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/0udrm7d46oi7oge3g4fba7hb5k/13039796972.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/f0854288c9943990441bd886ebd3cf5d/87998738807.pdfIn PDF document text
    • http://ballstonfamilymedicine.com/clients/861402/File/boxedegenupiromibosegita.pdfIn PDF document text
    • http://ahs1968.com/clients/d/dc/dcea35c349c70fb55dca458fc6558ff6/File/38616247798.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/1cdd97eb18d6c396c1c9a3169811de67/baneripipekatit.pdfIn PDF document text
    • http://kryotherapie.net/neu/userfiles/file/91415565921.pdfIn PDF document text
    • http://beerskiboot.com/img/upload/file/78901518426.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/38787217332d749f548ecdf32c579617/86911446012.pdfIn PDF document text
    • http://teckim.it/themes/userfiles//files/gosivusejagosalirewobe.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c515ac8104d---jotaduxikefo.pdfIn PDF document text
    • http://richmediahouse.com/admin/uploads/file/47451698953.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/51959750500.pdfIn PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/6075ee3747b2d41bb00f2ef9698d728c/wezerukemegafufogomupisi.pdfIn PDF document text
    • http://snailgame.ru/upload/files/20210720111857.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=download+wps+fill+and+sign+for+pcPDF 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_off00012d4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D4B 10652 bytes
SHA-256: 31c7db12ed6ee97a27cd175b11c1a6518c5c3b39fee9cf1b127c7d225f43bc96
font_01_sfnt_off0001459e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1459E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1