Malicious PDF — malware analysis report

Static analysis result for SHA-256 c14d70e70d332b63…

MALICIOUS

PDF

92.7 KB Created: 2021-06-27 23:05:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d6568e54f9d52e43cf1b31a5f4d61a95 SHA-1: 8c4b6091ddb86dc26ab566aa9d1ede039b7a1991 SHA-256: c14d70e70d332b63a7820f4c48d82aff50fc71ed8d455754363cf182b4e00f2f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm with numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of these links and the overall detection profile indicate a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/4a2614f927cf44dda379c75217302fed/jitutilokavoxozokesogujo.pdf
    • http://mazdooradda.com/userfiles/file/74761824394.pdf
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a940064224---wumunotem.pdf
    • http://angelojrobles.com/admin_initial_test/userfiles/file/49360681644.pdf
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/69324eccfda945a3ab1e36cee44a99dd/23785475787.pdf
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/52b0na2lr1992m6vq99m1v4b93/kuruvid.pdf
    • http://taiwanglassgroup.cn/userfiles/file/12010626778.pdf
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/cd0f7b857d1fff55a02de0a68dbf5ac1/denojudikexej.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/19b2o9b3brri1nbcnib55ga5b2/miwitazopovanadadowetunoj.pdf
    • http://luckdidea.com/ckfinder/images_store/files/86062542368.pdf
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608fc5ec05f0f---vazowogizuboz.pdf
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6724def180---66566253899.pdf
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16096412bca575---komazaboradubi.pdf
    • http://fusheng-vietnam.vn/admin/webroot/upload/image/files/wanubovarol.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607b509644e3d---55456411862.pdf
    • http://murphysbeads.com/clients/54316/File/nuxabudaribanonozikila.pdf
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/77149f238e943dfaabaee8114db48156/1466042730.pdf
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609a6c8cac08d---37218255761.pdf
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/7baba258fdf6f8086405128e102b644e/ginimuvugeduxuvifubir.pdf
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609d03e3b5c3b---povedix.pdf
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/a8b178315c5e57cee93dce72d6cfa633/nozexaduwigopapizerex.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=veterans+benefits+administration
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010639.bin
bece1aa16e97a7776d1620cc569b2360c754bd8fe513e3fa009055c20a39263c
pdf-font-stream PDF embedded font (sfnt) at offset 0x10639 17928 bytes
font_01_sfnt_off00013587.bin
503c8e38682984395e4e9aa7a8539a46dbd032f7bfb6a745516dc621d70b98e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x13587 10576 bytes
font_02_sfnt_off00014dac.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14DAC 16792 bytes