Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e019322dd2b1a53…

MALICIOUS

PDF

85.8 KB Created: 2021-09-17 11:09:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5dd5ddfedd5ebe4fdacd1a2ca333dea3 SHA-1: 57f8977be0e71ebad941e50e6a8eabdf40feffd5 SHA-256: 1e019322dd2b1a537ff36f0c5f4dc2cb895abf7313b1bd57f758e833d4ac1089
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1539 Steal or Forge Credentials

The PDF contains embedded JavaScript and multiple external links, some pointing to compromised WordPress upload directories. Heuristics indicate it's a link farm and a lure for MFA or one-time code harvesting, consistent with credential phishing. The embedded JavaScript likely facilitates the phishing page display or redirects the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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
  • 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://pixomot.ru/uplcv?utm_term=how+to+transfer+photos+with+bluetooth PDF link annotation
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612e9f5b30d8f---mekikexup.pdfIn PDF document text
    • http://cdmvt.cz/sites/default/files/87403941990.pdfIn PDF document text
    • http://www.tramag.pl/upload/file/bulizafanubu.pdfIn PDF document text
    • http://thy-environment.com/userfiles/files/zodogifimop.pdfIn PDF document text
    • http://autosklo.sk/pictures/file/45729929667.pdfIn PDF document text
    • https://rajakedua.com/contents/files/41689559179.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f20842f945---sigepanap.pdfIn PDF document text
    • http://fxlcd.com/upload/file/lekijawebulopod.pdfIn PDF document text
    • http://restokrat.info/userfiles/file/73084504900.pdfIn PDF document text
    • https://psfund.org/public/uploads/files/cms_files/49980824126.pdfIn PDF document text
    • http://citra.cl/userfiles/file/juremuxagisi.pdfIn PDF document text
    • http://cleangroupbd.com/ck/upload/files/tufuponolexejo.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/75340ff7e95405bb8acdd5f3290ab4ca/29658870719.pdfIn PDF document text
    • http://osstemcardiotec.com/files/fckeditor/file/1879539834613faa71be062.pdfIn PDF document text
    • http://duhochoangthanh.com/upload/files/34331614851.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/dakazosupabawezusazot.pdfIn PDF document text
    • http://toyotaprius-custom.com/js/upload/files/tatakawox.pdfIn PDF document text
    • https://thegioidongphuc.net/ckfinder/userfiles/files/japetezomagexoke.pdfIn PDF document text
    • http://dolphinkorea.com/files/files/gevodidelufewaza.pdfIn PDF document text
    • https://wonkingchina.com/d/files/zedadejal.pdfIn PDF document text
    • http://merrygoldholidays.com/ckfinder/userfiles/files/semuvozinadojikejel.pdfIn PDF document text
    • https://saintarseny.ca/sites/saintarseny.ca/files/file/23256193341.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c54babe840---10948103619.pdfIn PDF document text
    • http://sochi-polyana.com/ckfinder/userfiles/files/tefodo.pdfIn PDF document text
    • https://marblobath.com/app/webroot/img/files/ropagitagekuwisifanelejam.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC0 17788 bytes
SHA-256: 81aecc3748888d60254003ed61540474f274d00f030171ced63d50743cb00249
font_01_sfnt_off00011940.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11940 10772 bytes
SHA-256: 53cc97ca1db4eb7c4d346386c1ea857493fcde2e72987bf07bcaf9f08304f254
font_02_sfnt_off000131c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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