Malicious PDF — malware analysis report

Static analysis result for SHA-256 54297d50612aabd3…

MALICIOUS

PDF

76.8 KB Created: 2021-09-06 03:49:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e2dfbc64d23d16706385c4292c608911 SHA-1: 0c8145569870893013d0752b5e7bd29febcc2792 SHA-256: 54297d50612aabd311909866e5654ae9aed51e6c3e7be1e145d20b0ec31b5259
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://arcomproltd.com/userfiles/file/gomesisez.pdf In PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/v8ru124uanmm5ak1u19vqnpv1d/68521638013.pdfIn PDF document text
    • http://indianaquesters.org/clients/9/95/9573c8d6e108c9729a37356986dd5b5e/File/56833364320.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/nipudofurivowefutogevin.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/64984955027.pdfIn PDF document text
    • http://choinka4x4.org/cms/files/file/zivegezivixisabi.pdfIn PDF document text
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/9fb164e5d6b3d185d014c1eaa1f92945/lomogegamonofikagedemix.pdfIn PDF document text
    • http://ptaki.info/imgekoprojekty/files/94102706072.pdfIn PDF document text
    • http://njf724.com/basefile/janatalnajafcom/files/zaranodolepilolonexes.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/o4so4mba1g2g9s4s06gi1oniuu/27073005124.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/3a6ac4e694114d80bf373c1bcb711de7/dafifav.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/sawadigozosinarirenim.pdfIn PDF document text
    • http://ashokarefrigeration.com/userfiles/file/butunurijuxu.pdfIn PDF document text
    • http://abovomedia.hu/_user/file/fodametuxol.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/182b519ee7b775ca3d994a3c44d2b262/bebipexawonaborijoxigim.pdfIn PDF document text
    • https://360clothing.in/home/www360cl/public_html/uploads/images/files/pejaxavo.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/kafoxosose.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160fbab064b48e---telosinojofalo.pdfIn PDF document text
    • http://eaeocs.com/clients/c/c7/c75ed17bfa54634cfc1039f1b599a7e7/File/zinavisipezib.pdfIn PDF document text
    • https://smartstone.ca/userfiles/files/23170690925.pdfIn PDF document text
    • https://floraplant.gr/FCKeditor/userimages/file/faredimaberutigovewixu.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/083a593417aa513d2397228d6966b468/62337524490.pdfIn PDF document text
    • http://www.waetsukai.jp/system/ckfinder/userfiles/files/piteli.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b1342ee734c---fupuladuvofixuxibe.pdfIn PDF document text
    • https://mptradingcompany.com/userfiles/file/xupanobaxidiso.pdfIn PDF document text
    • http://thedreams.cz/files/dilupotupibavewuvorozi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=foxit+phantompdf+mac+downloadPDF 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_off0000c759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC759 10648 bytes
SHA-256: b2607c0e096e1d9f7be03454e6447c94c7bfe810e424a0f397d61294759277d2
font_01_sfnt_off0000df91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF91 17824 bytes
SHA-256: d13bf79bc10cfe4e24d9afb50e1e52a8a8d0d0ef62f39bcce40022756a395f55
font_02_sfnt_off00010d59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D59 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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