Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f502d0312874156…

MALICIOUS

PDF

82.9 KB Created: 2021-09-04 01:34:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a13f966ca7e1821faa0afc05137a3c0c SHA-1: 148aa101e2f2d2da6fb0d45e758aad1c41d710c3 SHA-256: 9f502d03128741566afee91aea5f971982d6aeaec886acb1c37c47127b6ee4cd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The document contains numerous external URIs and link farm patterns, suggesting it is designed to redirect users to potentially harmful websites. The presence of embedded URLs and the nature of the heuristics point towards an attempt to lure users into clicking malicious links, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://infrive.ru/uplcv?utm_term=influenza+h1n1+pdf+2017 PDF link annotation
    • http://tourbusan.net/FileData/ckfinder/files/20210803_37A352FDC8CC2C94.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9604621118---bowegilakuxowof.pdfIn PDF document text
    • https://leo.tw/upload/ckeditor/files/67556581533.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085e6dea913d---93366365703.pdfIn PDF document text
    • http://dejede.com/userfiles/file/15751494827.pdfIn PDF document text
    • http://www.kymkarajok.net/tiedostot/files/sefizizur.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b720ca9cb1---pumifulunidekarekozo.pdfIn PDF document text
    • http://brianhaymore.com/images/e/file/mujimer.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160aa2e618960f---81198858909.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eff2434c3e---61405691274.pdfIn PDF document text
    • https://vargyasnekonyveles.hu/kepek/other/file/92804092089.pdfIn PDF document text
    • http://tingchucontrol.com/Uploadfiles/files/58104371980.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160bc5a25af5a9---98437273173.pdfIn PDF document text
    • https://mk-promotions.com/ckfinder/userfiles/files/1350281960.pdfIn PDF document text
    • http://daoltrading.com/userData/board/file/96711161959.pdfIn PDF document text
    • http://marketherballize.com/ckfinder/userfiles/files/gakoponevatiraku.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/d4ae43a09603f3dac9f36fd77664f207/94904908175.pdfIn PDF document text
    • http://fotografieindex.nl/images/uploads/dosutudelatama.pdfIn PDF document text
    • http://emeraldoutback.com/clients/f/f6/f61299a274fa8fdb0c00f5b1ed511d42/File/lusati.pdfIn PDF document text
    • http://color-gateway.com/userfiles/file/97417938174.pdfIn PDF document text
    • http://www.roosprommenschenckelfoundation.nl/ckfinder/files/files/fagifedofodopavi.pdfIn PDF document text
    • http://myucmas.com/userfiles/file/2754044991.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b9ef37cd14b---22187473833.pdfIn PDF document text
    • https://svingenieria.cl/userfiles/file/43857389830.pdfIn PDF document text
    • https://gulfsupremesa.com/ckfinder/userfiles/files/58133714105.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFBD 10472 bytes
SHA-256: b9a703d73e929fe68fe5bd0dc6c6acf6a7792cf43c4bcff1427d933888d25f82
font_01_sfnt_off0000f790.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF790 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010fa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FA2 17792 bytes
SHA-256: c0431aeb3375f896f311315cdacc43bc88abe8ce52eaed4abc6dd140c91c13e5

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