Malicious PDF — malware analysis report

Static analysis result for SHA-256 68a174d933335f6b…

MALICIOUS

PDF

85.6 KB Created: 2021-07-21 08:57:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 27396c5b8964d3237f3b2f58b090a466 SHA-1: 88c928f1bbd4f31e17c44a9b772a4a24c357ee98 SHA-256: 68a174d933335f6b990ebac30ffee0fbf9e5f4e50f35440cd927d8bc7fae7c9f
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised websites, a common technique for distributing phishing lures or malware. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or a trojan. The presence of numerous unknown URLs suggests a broad distribution or redirection infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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 http://teaandtiarasmontreal.com/clients/f/f0/f03dfc1790708d0b03c48e9879ef2ea6/File/46917847285.pdf
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd0f87ceb01---viposedagixe.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1e0c7145d---57188577751.pdf
    • http://haustechnik-hagenauer.at/nevub.pdf
    • http://myblindz.com/fck_user_files/file/gaxumugin.pdf
    • http://djapm.com/userfiles/file/40550464857.pdf
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160dcb1a170bc3---poripilomunijawozobisojab.pdf
    • http://webelievedin1984.com/clients/6/67/676624d6593aa512bfa6e10e765af00e/File/45838197496.pdf
    • http://clairerolo.com/userfiles/file/19523976354.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1609c7e6c511db---4759267755.pdf
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160776b89845f5---23786389013.pdf
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/e19a749c6123e1d228e8df31241ff214/43629263618.pdf
    • http://driver-jazda.pl/upload/file/79488025958.pdf
    • https://artasedanasingaraja.com/uploadfck/file/6597196701.pdf
    • http://wsm.hk/images/uploadfiles/file/62405541950.pdf
    • http://aelma.com/sites/default/userfiles/file/sawuxegofolubozipepipura.pdf
    • http://alkanboya.com/files/file///87256528451.pdf
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/37b634622630b35276949d5d48e9d334/55005009075.pdf
    • http://verdantnorwich.com/clients/3/30/306756bb587dffcd11ca74610d845a16/File/39399639128.pdf
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/aenum6lf0lcsnlpqju1pq19pt7/15822036369.pdf
    • http://atthaya.com/file_media/file_image/file/davuxawadopojavokogebewu.pdf
    • http://chaitraglaze.com/uploads/xelururoliporek.pdf
    • http://cheapmarkt.com/userfiles/file/88914941045.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1608e40d6b2ecb---bibumabotunod.pdf
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/44f380f0a12b8aa966cd41cbd9593c66/bekadovutozufu.pdf
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/6575cf2be0d3b280e54878031ae6d9a8/gikogetigeniromized.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=daddy+long+legs+are+not+spiders
    • 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_off0000ebea.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEA 16792 bytes
font_01_sfnt_off000103fc.bin
e8f21c9cd20bf4067be19d3774e5c7cdf558a4022af56b108fc7c679bc994446
pdf-font-stream PDF embedded font (sfnt) at offset 0x103FC 17176 bytes
font_02_sfnt_off000130a8.bin
64761ce44ac8de3513e12b4923d0eea120c54442afa534246df62854790c88c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x130A8 10684 bytes