Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d33717608807477…

MALICIOUS

PDF

84.9 KB Created: 2021-06-30 04:50:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5764230951be1519059d6ba571e927a0 SHA-1: b986caba9b0a00d1b45714621525081a586a4517 SHA-256: 9d33717608807477022efa0192d88e2f3f4117ce8ce2cb402861b424c4049e20
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a link farm pointing to numerous URLs hosted on compromised websites, suggesting an attempt to lure users to malicious or phishing content. No scripts were extracted, and the document body was unreadable, but the presence of many suspicious links strongly indicates a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • 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
  • 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 http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa52497ef37---19501349331.pdf
    • https://hagepoorter.be/files/files/kivusebomuju.pdf
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160810797de19e---zimirulego.pdf
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080536296b43---87620429872.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093c9f1e3da4---46830170269.pdf
    • http://tcihk.com/userfiles/sezalosos.pdf
    • http://portalcom-b2b.es/img/user///file/_0646607001619828724.pdf
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/d0ed7bf1f770acde2c4297f1f74e8f0f/ronot.pdf
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/5ac6be4b95efd1f606c5d4ea6b90cc01/lutebenefosegexameza.pdf
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/8b20aac099cdd2d516828e9b9fdb8351/rezabomekarozowapuledudaw.pdf
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa76b12108c---35768826526.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/kkc4gf16jks5h2jh69nkdnsoj1/61703999795.pdf
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/jjpe8o28enqlqrql6lr2cf4f54/59990140336.pdf
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/16082d0b604da5---rikizuzetabomegatelawas.pdf
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160a559dc9e582---xinisilu.pdf
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/da63816f69ab80d566e2154656ac26bd/57731012936.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/1d27b25ff64c56ec2740289288f7ca7c/99250316794.pdf
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/649faef6e2c62076b0f16d5a9209d9df/gowowilusulepefi.pdf
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/en9j3r166bfnln448hkgtliq4m/datirewumuvali.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c872aacfd7---ronejujan.pdf
    • https://holocaustresearch.pl/nowy/photo/file/kipekozumalewuv.pdf
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8b1aa5fe4---63236703819.pdf
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/f3600472874a8eeb96d4a765cb8fcee2/rimunevovokemegali.pdf
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1609cedb9df5a7---94845209975.pdf
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b736864a5f7---87691916251.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=left+brain+is+for
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea48.bin
64b92146c5a542d28202908d2a8f1acdb79489aec10a84de26fa1f6a1a032e99		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA48 17216 bytes
font_01_sfnt_off0001174e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1174E 16792 bytes
font_02_sfnt_off00012f65.bin
6a3fb328768470c9dcb7bcbbf273426f638a5d6ba2f72754fdac90450f798d92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F65 10256 bytes

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