Malicious PDF — malware analysis report

Static analysis result for SHA-256 2be43f65b2e26ba6…

MALICIOUS

PDF

77.4 KB Created: 2021-09-01 02:17:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 18033f0177515e884fd414d4f3f967df SHA-1: 5b9df8adc7414749126926ecef3e0a6a3ea26039 SHA-256: 2be43f65b2e26ba6402703d649ed9aeccbea5762b5668726ebe07ce8ccd6fa26
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.012 Process Injection

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous links, many hosted on compromised WordPress sites, suggesting a link farm designed to distribute malicious content. The presence of these links and the overall detection indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d332056e0b5---nenegukuxuri.pdf
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b69cbaace01---donarar.pdf
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d052a30cb9---paluxivan.pdf
    • https://purefeeling8.com/data/file/kosebufu.pdf
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6ce17a451---55955639319.pdf
    • https://dubigroup.com/admin/fckeditor/editor/filemanager/connectors/upload/file/97928279107.pdf
    • http://helenhotel.vn/upload/files/85071760679.pdf
    • http://bioaec.com/userfiles/files/wosakarijikupale.pdf
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b5dd09d8946---tubin.pdf
    • https://burlingame.com/wysiwygfiles/file/25923605231.pdf
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160e28e1013d6d---97093472257.pdf
    • http://hasyo.net/files/file/57234714305.pdf
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076834d6f413---92865708573.pdf
    • http://airbaankhubon.com/userfiles/file/zesadesesi.pdf
    • https://aulacvn.com/upload/fck/file/gevofo.pdf
    • http://www.emailposte.com/pictures/forunipapuvubatitesilo.pdf
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a79fa049ca1---30645358980.pdf
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160cac7256bfb6---sazabodewugabowolidenefa.pdf
    • http://millecolori.it/images/file/sorasa.pdf
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/3a02492d563e0f77cae4bc1bd8a5ac49/bofididubit.pdf
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc49a4709f---21944382628.pdf
    • http://banghetretunhien.com/media/ftp/file/zomawemonoli.pdf
    • https://liepasmuiza.lv/userfiles/library/degox.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=c%2B%2B+mcq+with+answers
    • 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_off0000c7b9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC7B9 16792 bytes
font_01_sfnt_off0000dfd0.bin
901939ea01c2d31801bd8148b047e620051157bf07a87f32c5dc959edc7aab3b
pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD0 10592 bytes
font_02_sfnt_off0000f7db.bin
9ea885a65d7f5d4a2d22f4915f1d5c3b12e9560bf472ef1c72ed7680ac14837a
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DB 17928 bytes