Malicious PDF — malware analysis report

Static analysis result for SHA-256 415daaaa114cbb0a…

MALICIOUS

PDF

73.8 KB Created: 2021-08-20 06:01:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: a24a5ed93df9e0119a1be6f16ba3ced3 SHA-1: c328296801233b9401133e127ee9444878209ca1 SHA-256: 415daaaa114cbb0ac2b545072dd5ff966d3f353311454f3e6c7d7b90ab31af7f
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. It contains a link farm pointing to multiple compromised WordPress upload directories, suggesting an attempt to distribute further malicious content or phishing pages. The presence of external URIs and link farms indicates a lure to external malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160cfd27aa5d26---muwolekunopil.pdf In PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611f0700ca83a---dopalomojawujegobeg.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/60df42d4948829bba866939748cac27b/27428404027.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160aa30aaa7c09---gedugexixepururaw.pdfIn PDF document text
    • http://thetsaban3watnuea.com/UserFiles/file/29063935116.pdfIn PDF document text
    • http://reklamavysocina.cz/UserFiles/File/xegasuza.pdfIn PDF document text
    • https://gionggiacam.com/ckfinder/userfiles/files/13172739601.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/a8b9699e53d5eaa17753a9760ac92593/84742645919.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/fixuwiwavap.pdfIn PDF document text
    • http://peoplefoster.com/pliki/xobanalebezowokojeb.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607a254d11dbd---titow.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4d094ed24---35304564932.pdfIn PDF document text
    • https://desense.eu/uploads/wysiwyg/files/20514315967.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/sepakedepifexevupivola.pdfIn PDF document text
    • https://www.reflectionuk.com/wp-content/plugins/super-forms/uploads/php/files/l7dsanekd3t7i0ktkbgm5bgq8l/lunojilebidejutajef.pdfIn PDF document text
    • http://sanarina.de/ckfinder/userfiles/files/29402777835.pdfIn PDF document text
    • http://ithaca1961.com/clients/875375/File/gamugudadobobitakolisa.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c5a18fc6b01---tinefazilut.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f96d196c6---73505828916.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/dagokuturulibexa.pdfIn PDF document text
    • https://anup.bo/images/files/dolukek.pdfIn PDF document text
    • https://motacademy.it/file/11201563275.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=shutter+island+full+movie+download+in+480pPDF link annotation
    • 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_off0000bd79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD79 11496 bytes
SHA-256: 8f4787acc4150724f54e501b0b5a1344bc761428c65ec2a732d3cba7433ddd7b
font_01_sfnt_off0000d88c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD88C 16072 bytes
SHA-256: cda1d9c4aeee4bce7380987149cfe13d10ff446594a1c5bb60b1cd26a0f3126c
font_02_sfnt_off000101cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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