Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2cce40a53dfa42d…

MALICIOUS

PDF

87.3 KB Created: 2021-08-12 22:08:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 17cd6b743133d2e7fde21da0fbd1e0f1 SHA-1: 14dbe1068d114ffbbcddcc03c3a9bc19611a7b05 SHA-256: e2cce40a53dfa42d06edb4385f6120e5077670c5d2710148fcf638d154ff7d88
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious. It contains a link farm pointing to multiple external PDF files hosted on various domains, many of which appear to be compromised CMS uploads or disposable hosting. The presence of these links suggests an attempt to redirect users to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mineraux-et-lithotherapie.fr/ckeditor/upload/files/sagiratekajiranozovud.pdf
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/ce72e69718dbe7944746047835b41bfe/tijadivenaxidunuzixas.pdf
    • http://esoftland.com/userfiles/file/megakudoxaju.pdf
    • http://dribblebar.pl/userfiles/file/7272308698.pdf
    • http://brilspa.ro/userfiles/file///45666058776.pdf
    • https://pensiuneavalentina.ro/app/webroot/file/22962074400.pdf
    • http://veiligheidssloten.nl/ckfinder/userfiles/files/jerokikibemumamoxu.pdf
    • https://remoteyourstaff.com/calisma2/files/uploads/11866151180.pdf
    • http://bvmnotarissen.nl/app/webroot/files/ckeditor_files/files/famabonuse.pdf
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c56d13d923d---69335765670.pdf
    • http://trevelsi.ru/ckfinder/userfiles/files/xoxinero.pdf
    • http://amoy-art.com/Upload/file/bodarob.pdf
    • https://cristalensi.com/public/File/44495439044.pdf
    • http://abwingsva.com/uploads/files/dadepokiwo.pdf
    • http://filatelianumismaticaumbra.it/userfiles/file/25005126726.pdf
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea7151a261---27795797148.pdf
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/c434e9e5f269b11e972cc035360a8469/26212600779.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097e78ec1218---jofirisiguk.pdf
    • http://goozzl.com/userfiles/files/wotimexulexanorafonur.pdf
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ab3a2e0cf45---61817359561.pdf
    • http://rogersdesignhouse.com/uploads/files/97423448803.pdf
    • http://alexlunacoach.com/img/editor/file/1487159709.pdf
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a1d1e47d289---kisinixuz.pdf
    • http://h-st.nl/bestanden/files/xugojenavukupufanokexo.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=control+systems+engineering+7th+edition+nise
    • 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_off0000f0ab.bin
6c3cc36c0638885ce5bb2031f7121764eadabb007f6ead78fee0e3c540fa112d
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AB 17432 bytes
font_01_sfnt_off00011e8d.bin
5bc8916cec6b656417c643fb24a1ced71c0fdfc9eceb9c6ed284e81555248517
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E8D 10728 bytes
font_02_sfnt_off000136e5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x136E5 16792 bytes