Malicious PDF — malware analysis report

Static analysis result for SHA-256 220d60697acc77aa…

MALICIOUS

PDF

93.0 KB Created: 2021-08-13 10:49:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4e15bec2187e11ef5f901f33913adb43 SHA-1: 2cdf8234f094918ce622e4aa9a3172fba8291e39 SHA-256: 220d60697acc77aa162dbdfec51e7000faece78ced983f2f90ee8f38dfe5bdcb
164 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

This PDF document was flagged by ClamAV as a phishing trojan and contains embedded JavaScript. The document also features a large number of external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a phishing or credential harvesting campaign. The embedded JavaScript likely facilitates the redirection to these malicious URLs or further exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://inwebjor.ru/uplcv?utm_term=how+to+reset+brother+printer+mfc+7360n
    • https://clarkfamilybuilders.com/home/clark/public_html/ckfinder/userfiles/files/luxuxewupewabujun.pdf
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609069e26b542---fupidalofi.pdf
    • https://austarpharma.com/upload/files/23275055203.pdf
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a982a97af2e---mogefijonazomu.pdf
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609e51fe63fef---fagilunure.pdf
    • http://samtekelektrik.com/files/99909682910.pdf
    • http://jjsgreatescape.com/uploaded_files/userfiles/files/85792298500.pdf
    • http://emploi.nat.tn/ckeditor/ckfinder/userfiles/files/zogozexi.pdf
    • http://fsanaq.com/upload/file/210718005459031877xad7u9hlh4ih.pdf
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160786072435d6---41418311688.pdf
    • https://reaga.net/js/ckfinder/userfiles/files/tubexupemovekuro.pdf
    • http://sun-green.de/ckfinder/userfiles/files/89435764833.pdf
    • http://les-dvorik.ru/userfiles/file/40427664242.pdf
    • https://collegemahan.ir/basefile/collegemahanir/files/48181463315.pdf
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/c28db46ed973145f87eb8441964d589c/81778475940.pdf
    • http://yameitecl.com/ckfinder/userfiles/files/20210718_081238.pdf
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/5ebbee0880888cb54523ff1796610c9e/telidigosi.pdf
    • https://aquafilling.com/userfiles/file/weratabimoti.pdf
    • http://bukharaatlanta.com/sites/default/files/file/93489449484.pdf
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9824abbfbc---fovezuxememevozuzo.pdf
    • http://www.rify.us/cms-uploads/files/fakezupelemisavolej.pdf
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/1hst8mq2nqinu98o7c83ci6k34/nefimakerepexoloduvup.pdf
    • 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_off000106b2.bin
209cf3ab219155a40e2b2baeac7f913f84b9186503e64ea0fbda86a9c2b485fe
pdf-font-stream PDF embedded font (sfnt) at offset 0x106B2 11264 bytes
font_01_sfnt_off000120d1.bin
049b2df5fc2e179b03e5e53111241901720ee373cf8549f4a2ba98003b25c174
pdf-font-stream PDF embedded font (sfnt) at offset 0x120D1 17516 bytes
font_02_sfnt_off00014ed2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14ED2 16792 bytes