Malicious PDF — malware analysis report

Static analysis result for SHA-256 60760bae38d0ffba…

MALICIOUS

PDF

126.3 KB Created: 2021-07-03 07:02:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 825dab4104e60189e3dcafa8913cfcd1 SHA-1: b379324778be77e633d0f7b8e73fac4f3ceebc3f SHA-256: 60760bae38d0ffba033d0ce8b3f1c430d3d46fd3abbe4c6ca38f6dcdfe0f390d
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to facilitate further exploitation or malware delivery. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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 https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1812cdde9---luwexex.pdf
    • http://hilltop1976.com/clients/24685/File/nedabupipivukeworasaz.pdf
    • http://career-id.org/ckfinder/userfiles/files/3081344343.pdf
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083b091c3bab---42026181173.pdf
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609401c3b478b---4742233182.pdf
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f79888947---nubogibasijov.pdf
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160946b1619f2f---gitaxiwo.pdf
    • http://obasekiestates.com/UserFiles/file/fupemanupodop.pdf
    • http://kondicionery-vidnoe.ru/upload_picture/file/47902917112.pdf
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd2e49e141---votowevegubipirubomikof.pdf
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160940a1bb6b44---ligagoziz.pdf
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16080b35e45f93---11008221073.pdf
    • https://binarbaidequipment.com/public_html/userfiles/file/64450632545.pdf
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/hd7tvi3cgi42mm25ftefg03kgr/waginajotij.pdf
    • http://elfuklid.cz/foto/Image/file/99409264610.pdf
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c70487ad080---44717659582.pdf
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9284ec7b5b---nebepe.pdf
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/plkkup4m77bo94aiiqe7peuoa8/93566560525.pdf
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6c16ee568---furuwawamejerowagijun.pdf
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160840ab0ea86a---bunezojejapujozotugutim.pdf
    • https://angkorphotographyguide.com/userfiles/file/74788142502.pdf
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160d228adbadbd---jabujepirerekukunazatumo.pdf
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160733911a6250---gikesanatonuwukaferawofi.pdf
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/ffa02308f31ff76bfcdf8eeac5dfd992/dejokaj.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=top+100+poorest+countries+in+the+world
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018d7c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18D7C 16792 bytes
font_01_sfnt_off0001a593.bin
05bf00e901a268d753ac995748e63ded94848eb6dabdff4a1d2d037854a30d45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A593 10772 bytes
font_02_sfnt_off0001be5f.bin
78688b7f2882027a4107d8925df583d0d3f90be3a6bac049a2ad99f5ab29f6b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BE5F 17204 bytes

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