Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c5e444f8f41cf1a…

MALICIOUS

PDF

84.5 KB Created: 2021-07-09 13:30:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f62416225fad2cb2731a84faeb38aef2 SHA-1: b29ccbe730d327ff41334ceb3f878945a3f96ecf SHA-256: 0c5e444f8f41cf1a7f0cafca1c0f377a5986f6977ac5ef7db99a3a83e5c36575
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links hosted on compromised websites, suggesting a link farm designed to trick users into downloading malicious files. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bad395bd44f---fuvozoxoda.pdf
    • https://acryl-bg.com/userfiles/file/getegisejiwowose.pdf
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/ec8cbf0cf50a4e5fbb9274886ce20a87/73156036157.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608053a6d5ed1---32155907619.pdf
    • https://nepalipublisher.com/ckfinder/userfiles/files/69878903545.pdf
    • http://dianacb.cz/userfiles/file/wilaziratufipojerelaz.pdf
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/143416baabcaa90cf29ab85f8c90e61b/suxumaxaveguzusasin.pdf
    • http://divorce-difficile.fr/userfiles/file/fugobetilisome.pdf
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160814cf6670af---72789586420.pdf
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b0eaa3913ea---susug.pdf
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b42ee1db18---11495905733.pdf
    • http://sillajen.com/fckeditor/_upload/file/25899825611.pdf
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608b626259027---nekuvaropuvokofajuxumavo.pdf
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/1299f504ee78f4fc9ee1bd12061cf3df/xitinubabobewaxa.pdf
    • https://yucekalipmakina.com/tsrm1/img/userfiles/file/lapunobofeboxugoxijik.pdf
    • http://dui-antidote.com/images/userfiles/file/notasexupodapuj.pdf
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/t4ic2cs5bj6nusm11fh9p1o1b0/ponunasudo.pdf
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609269735d2d2---xofedimapiror.pdf
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/cb093aa99909ada0234ab4ed3aee6039/nakisabes.pdf
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098cfeebd78e---mobemusonafukisa.pdf
    • http://trungtamdaykem.vn/Images_upload/files/44366047762.pdf
    • http://romanakladatelstvi.cz/userfiles/file/rotofumumelop.pdf
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608f85112d32a---90088651236.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=granny+chapter+two+game+for+pc
    • 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_off0000e74d.bin
ef5dcd6d3fba9661920ee5f565bdbe51a776c93d042a34ccd3f34b49af39d9ec
pdf-font-stream PDF embedded font (sfnt) at offset 0xE74D 16964 bytes
font_01_sfnt_off000113a8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x113A8 16792 bytes
font_02_sfnt_off00012bbf.bin
ef050190a8fdadced79ee8450a016a2f8caef8060c14e4812911faa679fa3428
pdf-font-stream PDF embedded font (sfnt) at offset 0x12BBF 10860 bytes