Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c40fb217aa30028…

MALICIOUS

PDF

98.1 KB Created: 2021-07-03 01:02:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 69be14995cf9573ac1b81341fe30e251 SHA-1: 5a1ad4fc857f0bc6e60d7945b7c9ed115d531dcf SHA-256: 3c40fb217aa30028a548b37295ed744857cce0c2c528d3676618724e22bc5b07
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to redirect users to potentially malicious content. The presence of 'utm_term_redirector=True' further indicates a deliberate redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9785

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.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afb34a93534---76095806060.pdf In PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080ef81893c4---41667569117.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/152e6279e7342717db86194498a50bd6/sovibijujutazizirunu.pdfIn PDF document text
    • http://28777886.com/Lpf/UPFILE/userfiles/files/bixodikedufaliladizuj.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202104/file/kopavetar.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/191itplk02u3tufige39ogephp/51206409474.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/184b8b310dbe9b99ba3968e6d0960cef/54709153566.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/b8ddb09ce5c5b1e2be28162aad393d05/43655982223.pdfIn PDF document text
    • https://hmanagement.net/userfiles/file/zigumakagofa.pdfIn PDF document text
    • http://caf-ljubljana.si/docs/liwajeraxir.pdfIn PDF document text
    • http://teaandtiara.ca/clients/c/cf/cffd5a667a547ddf6f7ed7e454f715b7/File/memiwuvavotetunoli.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160a74c772f4b9---17489225592.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aabb721e17c---58630397364.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/e46fd9ba965631377897784c41273451/34232518899.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/2d81576896bac2da82196dec854495c9/44495195143.pdfIn PDF document text
    • https://mosallaesf.ir/uploads/ck/files/93722526350.pdfIn PDF document text
    • http://vytvarnyobchod.cz/UserFiles/File/463236726.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1eee25c15d---75401514341.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/fc1e2039a22364b77509fd4871b024d0/sowenirimewi.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/440e0ce5824f49c648b4502c0d8214f8/xujevalexu.pdfIn PDF document text
    • https://kudamatsu.org/userfiles/file/vadesubojus.pdfIn PDF document text
    • https://hantverksakuten.se/ckfinder/userfiles/files/xusopipuwafujipesur.pdfIn PDF document text
    • https://calmoinc.com/upload/editor/file/34802705453.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0fa06b94d4---degawajod.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/160780fb7a242d---80671250826.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=scrotum+in+malayPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1F2 30172 bytes
SHA-256: d13813c5d764deb5775548e58f84b83995e7c1db20b7d1346ec149077dd91a07
font_01_sfnt_off0001178c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1178C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012f99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F99 4172 bytes
SHA-256: e9859d6ce519f631e0fbf9d0303976f9899e094e532937150f1f2cadbecf244e
font_03_sfnt_off00013f2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F2A 20576 bytes
SHA-256: 405b001aa6d078168bcb171206b9d39bbe2d6f0138547796bfb72d345b2b2942
font_04_sfnt_off0001626f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1626F 10380 bytes
SHA-256: d0fd5944316445810d11254400fb6c172d925b5feb956baf7b226eee42957ac9

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