Malicious PDF — malware analysis report

Static analysis result for SHA-256 717e42099a18a8d5…

MALICIOUS

PDF

76.2 KB Created: 2021-09-13 13:59:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 83c18f6632e0dc5374834483511aa087 SHA-1: 428ff41de86dbf781b900d08ce94558679176ec0 SHA-256: 717e42099a18a8d513a22212a77e2110ef092848ff66375fa3299cf578bcf5f0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains numerous links to external websites, many hosted on what appear to be compromised or disposable domains, suggesting a phishing or malware distribution campaign. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this, pointing to a link farm designed to redirect users. While no scripts were explicitly extracted, the nature of the URLs and the heuristics suggest the PDF is intended to lead users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5732

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://infrive.ru/uplcv?utm_term=windows+7+dvd+usb+download+tool
    • http://mtkshop.com/images/uploads/file/22347921765.pdf
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ebd51700de---xajexovexobojixitobewa.pdf
    • http://sunil.kr/uploadfile/fckeditor/file/bilujop.pdf
    • https://projekt-lesen.de/userfiles/file/wakodutenixarovaro.pdf
    • http://cheliabinsk.realxenon.ru/uploads/files/lupebo.pdf
    • https://flardochform.se/userfiles/file/tazudujelepelojuziremup.pdf
    • https://wasael.com/userfiles/file/dobik.pdf
    • http://contactfm.be/userfiles/files/rumuwetinamunowenegu.pdf
    • https://girisimhaber.com/uploads/file/zidiworezofevedaxarememu.pdf
    • http://stadion-zarya.ru/ckfinder/userfiles/files/41341058717.pdf
    • http://www.mmd.ntou.edu.tw/ckfinder/userfiles/files/93070093390.pdf
    • http://gt-outillages.fr/ressource/site-image/files/74686036587.pdf
    • http://sin-hua.org/userfiles/30212254755.pdf
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613850042f1d3---22357053972.pdf
    • http://infas.cz/images/wiswig/file/dazuxapuji.pdf
    • http://sudeoksa.com/userfiles/file/20210906030515.pdf
    • http://global-leasing-management.com/uf/file/bedipovuvetegupiraxexuz.pdf
    • https://kligi.viart.lt/ckfinder/userfiles/files/43842159338.pdf
    • http://jia-longsofa.com/uploadpic/jialong151126/files/202109052300387682.pdf
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16135303a466ba---zevofavorojebiferaxujab.pdf
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/161380812aa627---nitup.pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e56b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE56B 16792 bytes
font_01_sfnt_off0000fd7d.bin
d1dc13d0d5fe33952083659cb0094669235f16250b48e99de218bbdc2f8fe689		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7D 18864 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.