Malicious PDF — malware analysis report

Static analysis result for SHA-256 bed803baa210842e…

MALICIOUS

PDF

77.9 KB Created: 2021-09-05 06:30:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 54c91a0e3e9581969203800422e3c6df SHA-1: 57ea710184b9a6c4a9552f55a25dd787119975fe SHA-256: bed803baa210842ec893257c980633496293fc0e9ff3379a3e76a8323b67d08a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URLs, many of which point to compromised WordPress sites or disposable hosting. The ClamAV detection 'Pdf.Phishing.Trojan' strongly suggests a phishing or trojan distribution intent. The embedded JavaScript likely facilitates the redirection or download of malicious payloads.

Machine Learning

  • Nyx PDF Classifier clean score 0.2411

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://cructi.ru/uplcv?utm_term=human+body+hormones+pdf
    • http://uss100.com/clients/5/56/562308f4da1da23328cfd9e5c9f3e68f/File/79756592415.pdf
    • http://sushinamu.com/uploads/files/wunijajalow.pdf
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/a6051cf9d6380eaeb18e02e06b682fbc/99039537018.pdf
    • http://lnianemarzenie.pl/userfiles/file/lefatebevinebaxutejoba.pdf
    • http://logisticsnetworks.net/ckfinder/userfiles/files/gekepidu.pdf
    • http://meadescafe.com/userfiles/file/3878893196.pdf
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/d361f9a54aaae12594f65e591127ee9f/84133565788.pdf
    • http://www.grupoaccs.net/ckfinder/userfiles/files/92094691609.pdf
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612c6626757c2---dilerun.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1609530bd3902d---palakemonorozezoravo.pdf
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160f3aac52acf5---41723818340.pdf
    • https://argekaucuk.com/nbg/upload/files/15755144395.pdf
    • http://celiapopememorial.com/clients/4/45/45605e685ba8a3b32f56966823665796/File/98587848476.pdf
    • http://secoinblock.com/upload/files/87560758116.pdf
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/a688f68612540531b5c5063444ea8d04/rebanukevixuruxukabowu.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b487467ad6f---91999105988.pdf
    • http://gianenricofabro.com/userfiles/files/vogojasopipage.pdf
    • https://kampusogrenciyurdu.com/file/towetune.pdf
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b33d445f2---gigozunapo.pdf
    • http://bestofbeer.ru/ckfinder/userfiles/files/81738927455.pdf
    • https://2-view.org/home/view/public_html/ckfinder/userfiles/files/disewowaroded.pdf
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/2a6012e2dffb343b4cf7ba874474ef54/vobonowowuwiwopafugaj.pdf
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/55622d634274570a71b8b969bf99736d/vetasujimujodixeduza.pdf
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd80441ce77---41591881870.pdf
    • http://hourinkan.net/js/upload/files/36419156276.pdf
    • https://anfauglir.com/images/file/pegokaxizazatekadajofuve.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_off0000df2c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF2C 16792 bytes
font_01_sfnt_off0000f743.bin
9c4fa970d614287c888c0d6fdf3d9193d8ae8874f8bdd9d009a7adfbeb4561d2
pdf-font-stream PDF embedded font (sfnt) at offset 0xF743 10872 bytes
font_02_sfnt_off00010fe9.bin
53e56d583ed6969ecbb7720facc44ea2b595ee9d55e2ff2eb7f33557c3f0f352
pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE9 17376 bytes