Malicious PDF — malware analysis report

Static analysis result for SHA-256 45995a91e10217c8…

MALICIOUS

PDF

82.6 KB Created: 2021-09-02 00:33:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9fce19d678daabbb89dabf242b16db95 SHA-1: ee9e98753db41b41d0316f599418006a601b5615 SHA-256: 45995a91e10217c8d0fa02b5d38b0af8e447551dac21c6bcf61c0ac1d7c47e82
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing users to multiple URLs, many of which are hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL targets are indicative of a malicious link distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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 http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f3dc384832---79200327121.pdf
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/f317d40789417467d1651e436c41c16a/taxojudedodinitevop.pdf
    • https://securityguardsupply.org/php/uploads/file/72230690779.pdf
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/e7iim3sidad2d0s5lce49oqa13/69947771422.pdf
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/5tmb31ndeamkjcjj0v1e4bhroo/xugazizurojoxalit.pdf
    • https://tagoproperties.com/ckfinder/userfiles/files/tejenupibubas.pdf
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/c5i1kkpjpjshh1riv0cslr7kc2/divubekajujatukisalomase.pdf
    • https://braindevelopmentmaps.org/userfiles/files/viganud.pdf
    • http://espacioschillout.es/images/admin/file/xanobije.pdf
    • http://absolutelyneon.com/userfiles/file/50521737457.pdf
    • http://lamelove-zakryti.cz/userfiles/file/gakigipufeveropa.pdf
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/h8mdjkmpv168i1smeh3tuns76c/91267478016.pdf
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/16104c169c0615---27818348370.pdf
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd52fdbac8b---kejomupe.pdf
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160aff06355974---zitixisipugilefele.pdf
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/odolos0ur52peheev1lripm9f3/12655301402.pdf
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b878947f66c---lilewuzetigebujukafare.pdf
    • https://oceanflowerhotel.com/uploads/image/files/75873586011.pdf
    • http://www.aqsclimited.com/EditorImages/file/kebemevotatix.pdf
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160722d38048bc---5164771725.pdf
    • https://keralahappyjourney.com/ckfinder/userfiles/files/mumuliwoxejolonute.pdf
    • http://irths.com/upload_files/files/34217897237.pdf
    • https://digireg.org/upload/34723569138.pdf
    • http://school19-zav.ru/userfiles/file/56703264473.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=op+tandon+physical+chemistry+for+neet+pdf+free+download
    • 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_off0000dc2f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2F 16792 bytes
font_01_sfnt_off0000f446.bin
d3b12f00d97e1f5a3b8f0a2653ec43fbcec61e8efbf63ed123b453d81eb1cc07
pdf-font-stream PDF embedded font (sfnt) at offset 0xF446 11112 bytes
font_02_sfnt_off00010e16.bin
beebacd4e1fa208d023cc35ad37ef6f4510d75800c4c4ccf20e709bfb4d533c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E16 17612 bytes