Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f4be860b5fdf560…

MALICIOUS

PDF

63.8 KB Created: 2021-08-21 10:52:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 756fc7350246bf00bc3b3bbed48539de SHA-1: 70ca2537ff2f187bf0edef038845ee70b128712a SHA-256: 5f4be860b5fdf560063ce519e1d622d61b7ea2b347bc84b60999286ecde0b474
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of external URIs and link farms indicates a likely phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9142

Heuristics 5

  • 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.
  • 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://pixomot.ru/uplcv?utm_term=motorola+software+repair+assistant+download PDF link annotation
    • http://sunnysolutions.it/uploads/assets/file/8140515626.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/0c6d006e708bb3fb0d7c9b3261a83b74/jipabuxaxug.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/sgrpb7bmrdi41gs85ib004eamc/23602443872.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ba6d5ddb59---22152003658.pdfIn PDF document text
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/78de260ee2622b9a4611893662be9a32/fevalixiwipuromurolupevep.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/776819ce1b2d9dbe7d65fd6b6e39feb7/31599919142.pdfIn PDF document text
    • http://summitremodelinginc.com/userfiles/files/42787877543.pdfIn PDF document text
    • https://chiataiec.com/userfiles/Proj_Name//files/zilotixukoxidi.pdfIn PDF document text
    • https://printjet.pl/pliki_user/File/80940988347.pdfIn PDF document text
    • http://womenshealthcarenp.com/clients/2/29/29a32d4da59f0b4eaa4573e1354aeabc/File/guseleturimoxebalip.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f246bdee838---82217267773.pdfIn PDF document text
    • http://danchrisjewelry.com/userfiles/file/nuwokujiposevogaxufuruzu.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1606c659d6d93e---41151980568.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b4b8c14b861---80837292088.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160aa56d011409---48897554449.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609c2cc680b17---sisipekovetawakulovuviwe.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/26dee68440e190101414ceb701749964/wolawiwenizofalopibofotut.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/5a75cdb8981c0c62b8977e8489b93039/tewugasefa.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072179a1353a---pujamorufufolurimomulizag.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/48894573860.pdfIn PDF document text
    • https://die-elke.de/cms/elke_page_files/file/56820370323.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/fc4a86a39486030c7734ac3da35fe073/zotowosekigazelegubapanem.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/v53apdca23omqih42dkmkfvibf/69959685743.pdfIn PDF document text
    • 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
stream_004_off0000e231.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xE231 17908 bytes
SHA-256: 85f7a8c25a8bc96e681f9534d971005fce99be85f70a0e8382a2d24c63885957