Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e338e316a84928c…

MALICIOUS

PDF

78.1 KB Created: 2021-09-03 21:24:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 383d9b035bc599061431c1c3d2bb32e5 SHA-1: 894c5b813387fd1ffb6889c1306d37e51f2e0a8a SHA-256: 0e338e316a84928c73cde5a3c5db7b30253b18457c85b2e4570f067e116a59ee
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains. This behavior is characteristic of a link farm used to distribute phishing lures or malware. ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3979

Heuristics 5

  • 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
  • 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://inwebjor.ru/uplcv?utm_term=borisav+jovi%C4%87+pdf PDF link annotation
    • https://aimhc.com/userfiles/file/9736609397.pdfIn PDF document text
    • http://minuspk.ru/minuspk.ru/userfiles/file/2634886689.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/jumilipulatasutupisegu.pdfIn PDF document text
    • http://splogservice.ru/content/file/mutagiditawa.pdfIn PDF document text
    • https://pastelbuilders.com/userfiles/file/genoposufamipolojux.pdfIn PDF document text
    • http://jyotiacademicpress.org/uploads/file/difikezasiwi.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a92ef2a24b0---fonatirodexunedoj.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8cec3a5f0---welafikofus.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160ac5889810c1---69191686431.pdfIn PDF document text
    • http://hotararicedo.ro/files/files/tudukaru.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/e1e350508be54c597fdca9eae3d66491/58822931055.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/ea49e408ba4d8d0ed2f0e81e4bfa32ae/26972721431.pdfIn PDF document text
    • https://collegemahan.ir/basefile/collegemahanir/files/gomubolalogilidagimug.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607539ed6b019---xatadorotenedif.pdfIn PDF document text
    • https://yomadesign.com/userfiles/Proj_Name//files/25596529153.pdfIn PDF document text
    • http://tjclassof1971.com/clients/1/16/169b02496b2253913efe31a5b05f4f66/File/90912026401.pdfIn PDF document text
    • http://happyhanool.com/ckupload/files/3677358509.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c2aeef5e507---31691322859.pdfIn PDF document text
    • https://aquatim.ro/uploads/files/sedazuzujajitetirufu.pdfIn PDF document text
    • https://nomortiga.com/contents//files/91857401789.pdfIn PDF document text
    • https://jurad.eu/files/file/14877642527.pdfIn PDF document text
    • https://bhiringisamsankalimandir.org/ckfinder/userfiles/files/20440204292.pdfIn PDF document text
    • http://zuche0551.com/upload/file/13493605828.pdfIn PDF document text
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/reretadonibupavokovi.pdfIn 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_off0000db17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB17 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f32e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF32E 10500 bytes
SHA-256: 62336e28bb1b102e3e2461f4c14ecefffba66e4de02001e880a8dc4b346556c4
font_02_sfnt_off00010b31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B31 19356 bytes
SHA-256: bd59675a635962c2dc6c943d5e0ee3fb845b69007b6d66367dd567cdf9829b8e

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