Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fd95dcafb38f22e…

MALICIOUS

PDF

77.9 KB Created: 2021-09-08 09:03:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f2498d96da2a72ff6ebbc33678f713fb SHA-1: 1d7ca6e0123de2751d7191cb371091eb1c7004de SHA-256: 1fd95dcafb38f22e7b7a9b201c86eac3a28d825b8151e40fad09172f7664fb18
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to compromised WordPress sites or disposable hosting. The ClamAV detection 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0' strongly suggests a phishing or trojan payload. The embedded JavaScript likely facilitates the redirection to these malicious links.

Machine Learning

  • Nyx PDF Classifier clean score 0.2411

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://drafthe.ru/uplcv?utm_term=percentage+word+problems+with+answers+pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a853b0cdc7a---lisaluzawuw.pdf
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/bc511b2eb657bdfa9f1c761caa6ecfdc/72854957467.pdf
    • https://le27.fr/docs/file/tiwigekopazagelivez.pdf
    • https://ludifrance.fr/userfiles/file/berix.pdf
    • https://quanghuydulich.vn/img_duhoc/files/jupipenes.pdf
    • https://hotelgaric.com/upload/datoteke/87112937632.pdf
    • https://imahima.xyz/js/ckfinder/userfiles/files/mudesomusotibupexisixo.pdf
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/e5a1a9d267815686c427970ddbdfb9bd/lusalofoneno.pdf
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dee8c26ded---tazibonojixabuzekevi.pdf
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/160886bdd39ea8---simebunirakowugufu.pdf
    • https://kenadong.com/contents//files/84558610211.pdf
    • https://rmp-familienanzeigen.de/cms/files/baxeduzikepefare.pdf
    • http://wannawwannie.pl/userfiles/file/25995714544.pdf
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609ef0d87d203---vizitisinafujev.pdf
    • http://cuacuontoanthang.com/media/file/binewafomigu.pdf
    • http://capmar.eu/userfiles/file/bigijokegapaposel.pdf
    • http://wib24-admin.de/uploads/file/12734800548.pdf
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/91120db1b92a762e5feb7f321f8478ab/wuwokata.pdf
    • https://drisraadentalcenter.com/userfiles/file/jarurivuxep.pdf
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160adb350a24ab---kusigidajovalenimufi.pdf
    • http://cuspsurgeons.com/userfiles/file/65094304691.pdf
    • https://travelsafeway.com/userfiles/file/73177079942.pdf
    • https://sardavetri.it/userfiles/file/56861632775.pdf
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1d68129604---xinawurisobitunupok.pdf
    • http://ramenzoni.eu/userfiles/files/32804896318.pdf
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc1c7c26a7---nazewivorufit.pdf
    • 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_off0000dc71.bin
f57a55cf350dc52beb51617855896a8ac9d23dc7856f5d04bad9c1d69e079c20		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC71 17188 bytes
font_01_sfnt_off00010920.bin
5a33d5b21b050686cf8b4a6ffca691f6a6f6daf1162bceca714ba9d028b091c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10920 11292 bytes
font_02_sfnt_off00012312.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12312 16792 bytes

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