Malicious PDF — malware analysis report

Static analysis result for SHA-256 450f01d8d85ac777…

MALICIOUS

PDF

85.3 KB Created: 2021-07-31 01:45:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9a4f2c1926979a9130ef64652195823a SHA-1: f0d27a5150e9e1fb0e82ca36bb18e0d4c74964cf SHA-256: 450f01d8d85ac777c57899e13de6b1e1aa0cff5ca4006ffc4f482633d5b02209
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external URIs and links to compromised WordPress upload storage, indicating it functions as a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure points to a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8158

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://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160afcc7c1d240---78005570872.pdf In PDF document text
    • http://agendatourvietnam.com/hinhanh/file/zimaxajixokitimovudib.pdfIn PDF document text
    • https://mvpartners.be/images/uploadedimages/file/61921692858.pdfIn PDF document text
    • http://hart-metale.pl/gimnazjum/userfiles/file/9172166327.pdfIn PDF document text
    • http://www.uniformsolutionsforyou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d20c4d5932---75646967237.pdfIn PDF document text
    • http://nicenpos.com/userData/board/file/xumegarewojipir.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/aa032c0be44f0d5323ae55f2db2a9d44/sowiwutupexazapexesis.pdfIn PDF document text
    • http://hpworld.hu/data/pic/Image/file/kuvevagotugekemosumixax.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/cu2mfj6v5h258mo82flj86qj89/kuvosojaluluwim.pdfIn PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/ebbea0041191dc2b09b08c504233dae0/262998698.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/m34ggqfu5tpq36bt3ohhb9k1o0/giwopulobamux.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/06f4b295c2e94cabbd3c042dd6af9c09/19948374048.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/tepif.pdfIn PDF document text
    • http://densayhongngoai.com/uploads/userfiles/file/73003410219.pdfIn PDF document text
    • http://househouse.it/userfiles/files/papakukawarizuneka.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//14524417776.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/dj5qki40m7i9qnv225oa424vi1/pubakisosobigenifuturu.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/fesezuvulifopubewururinix.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/noweso.pdfIn PDF document text
    • http://www.biotanika.pl/upload/file/boxutusofebulen.pdfIn PDF document text
    • http://e-pisanie-prac.pl/famprojekt_z_serwera/images/file/93048170691.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/4bdkoln67p51f3j6f4s1pra072/39610614693.pdfIn PDF document text
    • https://hostessima.pl/userfiles/file/19270330961.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=a4+leaflet+ai+templatePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011aee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AEE 10088 bytes
SHA-256: 961317c4dcaf66b2098cbb12059bf9df01fcf1dd7964658427724f0d4bc94b0d

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