Malicious PDF — malware analysis report

Static analysis result for SHA-256 e724ce8f809fcb02…

MALICIOUS

PDF

74.7 KB Created: 2021-09-05 14:23:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 884fe0b5604080bf2c5b787f71ba10b1 SHA-1: 522238f7544cf8200299ba7f13a863038779ec8f SHA-256: e724ce8f809fcb02e0435db9be75ea125639c9e62c73de2365ffbc1d12d8efde
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16073cd8dd7b0e---lukorusogomurupewomeviva.pdf In PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc988122de1---napulinimevalamepevu.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073762c47141---vevuwalobevatowonigovivoz.pdfIn PDF document text
    • https://gilbertems.com/videos/file/95457390154.pdfIn PDF document text
    • https://onsale.social-push.cc/data/fckeditor/files/37301618135.pdfIn PDF document text
    • http://bundoreh.com/fckeditor/files/file/sekuxasatifam.pdfIn PDF document text
    • http://circuitoinsulargc.com/documentos/file/59778019781.pdfIn PDF document text
    • http://thebankcardservices.com/uploads/files/18123228679.pdfIn PDF document text
    • http://mg001.cn/upload_fck/file/2021-8-23/20210823194757493231.pdfIn PDF document text
    • https://presentkompaniet.com/img/content/file/39045557258.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b915bbdb769---55440500860.pdfIn PDF document text
    • http://jyjwqj.com/uploadfile/file///2021052911430030.pdfIn PDF document text
    • https://vieclambaohiem24h.com/upload/files/47866626822.pdfIn PDF document text
    • http://sampsonancestry.com/clients/d/d9/d9bd9208c4e45de01aa31840e3a8c66b/File/37962342912.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/9f0cae3f0f14be6de538ebc0c5cb2290/nutazabi.pdfIn PDF document text
    • http://hnysft.com/d/files/6083255629.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16078b5fdb65ba---97073554811.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/64a42cb2e196154dd4a0a0ceaaf673e3/88498209448.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075e3177313d---29225083422.pdfIn PDF document text
    • http://mspchicagolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dugejelavo.pdfIn PDF document text
    • http://meruzhankhachatryan.com/app/webroot/files/file/sulemulidasotagove.pdfIn PDF document text
    • http://www.w.radeton.cz/ckfinder/userfiles/files/35916312121.pdfIn PDF document text
    • http://ihdbd.org/upload/files/34951002540.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/jdq47o0ta3qck9uiskuktvcg66/zezirilizofobuxaf.pdfIn PDF document text
    • http://qamsar.org/userfiles/files/4128864455.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=application+of+solar+photovoltaic+system+pdfPDF 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_off0000c0f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d90d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD90D 11048 bytes
SHA-256: c23778889cb8cd8b0fefacff5e2fce8e02e6a87f74b786ecab5e8db018567216
font_02_sfnt_off0000f2ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AB 16580 bytes
SHA-256: 15d7cc93751b33b0db1ccef12c845ed9376751d4b9d96cd375f7dfeac11b6086

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