Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce12815573ea452f…

MALICIOUS

PDF

79.1 KB Created: 2021-09-02 08:27:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 97d61752c903d27891a68d5cc54b401b SHA-1: d5fa7992795cfec7e8406c1ad5829639a1015048 SHA-256: ce12815573ea452fdf5feb6fa38bc4164cae5410af103b0cf5b584af2a6e94bd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to numerous compromised WordPress uploads and disposable hosting sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6426

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://medvor.ru/uplcv?utm_term=was+that+really+me PDF link annotation
    • https://ambalatender.com/upload/files/fatakebakovalelurogunos.pdfIn PDF document text
    • https://facade-metal.ch/ckfinder/userfiles/files/wosuwojufevenolasabizama.pdfIn PDF document text
    • http://stigstudiotecnico.it/userfiles/files/saxubezojin.pdfIn PDF document text
    • https://etest.vn/app/webroot/uploads/files/37127166631.pdfIn PDF document text
    • http://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/49p2pfa4d7bhmmf0m49tlk5lfm/losozekasarupameduxu.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606f00a900f85---83872252557.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072f42e1274e---59072001918.pdfIn PDF document text
    • http://dorrstrechy.cz/UserFiles/File/kusidakejafopike.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/9710338815.pdfIn PDF document text
    • https://visionbrindes.com/admin/fckeditor/userfiles/file/80781874519.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160795800a80b2---tofimizugofijubuleb.pdfIn PDF document text
    • http://veribase.com/E/file/95111624521.pdfIn PDF document text
    • https://caribemed.com/userfiles/file/48979291872.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e6b78ddd7---35060413836.pdfIn PDF document text
    • http://gpszone.hu/upload/userfiles/file/2165191633.pdfIn PDF document text
    • https://htlexpress.com/ckfinder/userfiles/files/xutiroza.pdfIn PDF document text
    • http://flygarfield.net/userfiles/file/84738233375.pdfIn PDF document text
    • https://tomas-music.com/contents//files/5404211394.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210728013654533.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db6e1aea006---28583497843.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160d81555f14a8---9167197320.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e8b329e38---nebatupudidoba.pdfIn PDF document text
    • http://prof-cosmetics.com/upload/files/rutimumujiro.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/li8i74emr2v7rmgtgp4slatbpu/favivosomagunepanaraka.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001031e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1031E 18444 bytes
SHA-256: 816d3d03fa3d74b1ae902d3df9d735bf049961bc6fc1ae87fb45a4a749d26e10

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