Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae6720d7420f2d65…

MALICIOUS

PDF

94.3 KB Created: 2021-06-27 01:44:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b132d984e034e7ab74cbc45cecab5249 SHA-1: 87fd99b651cb7afb081e960efbeaaadf9c834ef3 SHA-256: ae6720d7420f2d6523f09d3d14a5d6315f22e28fe9b1d49141b93785626c6c03
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous external URIs pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting. The primary function seems to be redirecting users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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.
  • 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://krisoc.ru/uplcv?utm_term=japanese+model+nude+pic
    • http://helderlive.nl/ckfinder/userfiles/files/79084294245.pdf
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160754df6ea38e---81400379276.pdf
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd19d2ea25---10386624041.pdf
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/7bf7c3f118a19c63641bd44618e993ee/28976548678.pdf
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160895516e75fb---16535913412.pdf
    • http://adveotec.com/img/file/25359029430.pdf
    • http://monkey-do.net/userfiles/file/91568550142.pdf
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1609850d9b670c---lasobogeres.pdf
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160bbe40d589eb---393069488.pdf
    • https://audit-advisers.com/userfiles/file/51823090580.pdf
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096ce4a417d7---91826169053.pdf
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/16078b643c2600---98889662866.pdf
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095b96615b76---72290555742.pdf
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d785c186155---74911300612.pdf
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/a531f32180bc9c53fda9a2057563f3ea/69939905955.pdf
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/a238abd13f83246a5653cee2c2fb2110/42757934488.pdf
    • http://hanhthien.net/uploads/file/kugojodaduvatebuzatanare.pdf
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/f6804fa16880d3a5cbaae8708d7e2980/befixawevejoxulu.pdf
    • http://shhs69reunions.com/clients/e/e9/e92da0bc0099326815942f81a5c18dfc/File/kosuvekenawumoraliduk.pdf
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606f29be0909c---21438114028.pdf
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/jo055oiphtp8gtov7fhv5mhcee/demafogelesixewagi.pdf
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608496f5e9b90---vuxus.pdf
    • http://monroehighwildcats.com/clients/40160/File/98917697583.pdf
    • https://otelnamore.com/wp-content/plugins/super-forms/uploads/php/files/baebe4473f8a407ce312a399a01b5865/54820881545.pdf
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160852e98a8379---80902933446.pdf
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f578.bin
80e583f3a3ac5fbff62ed878c462686e5045711e7f70140528a575b02f5770fe
pdf-font-stream PDF embedded font (sfnt) at offset 0xF578 17744 bytes
font_01_sfnt_off0001241a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1241A 16792 bytes
font_02_sfnt_off00013c31.bin
d1f505ee7ef92d991a40c5e777bb78d9e3c21520994d59b1eca7d050b2168d17
pdf-font-stream PDF embedded font (sfnt) at offset 0x13C31 10568 bytes
font_03_sfnt_off0001542d.bin
63529d6f02ed3d767ac770bb16c1876e48f2d92f9a4af693af1b268f91f684c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x1542D 16600 bytes