Malicious PDF — malware analysis report

Static analysis result for SHA-256 605265ea9c492a8f…

MALICIOUS

PDF

84.3 KB Created: 2021-09-07 18:56:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 2601e9299e86e8f043cb5dfb77f71f92 SHA-1: a909fd516f30b5876f730343eceb150631051a5b SHA-256: 605265ea9c492a8fa6ab5e3b5423e4a46b376913664e10e27f3bc8da7ee552b6
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to WordPress sites utilizing the Formcraft plugin for file uploads, suggesting a link farm designed to host or distribute malicious content. ClamAV and ML classifiers strongly indicate maliciousness, with the PDF being identified as a phishing trojan. The presence of external URIs and link farm heuristics points towards an attempt to redirect users to potentially compromised or malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfd41b045c3---64850501505.pdf In PDF document text
    • http://tuzvedo.hu/elemek/file/21267560650.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd2b0426b7---67161812708.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/rogamubirikipagejinugowom.pdfIn PDF document text
    • http://dodogs.ru/sites/default/files/file/giruruxajazubav.pdfIn PDF document text
    • http://rocb-ap.org/file_media/file_image/file/81358633752.pdfIn PDF document text
    • http://escrima-rlp.de/userfiles/file/38314782126.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160ac119299538---44396384899.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/vutakutopo.pdfIn PDF document text
    • http://haphadoor.com/upload/files/timufuxofewur.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/irparnmf9vtn2dcbu19h5n9ao2/78129516789.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/1f330fe42ea76f08a741547f1a1a5ec9/jujavivow.pdfIn PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/numalulosuvix.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160d535c9db2e8---99907469263.pdfIn PDF document text
    • http://songpinhao.com/userfiles/files/33541342157.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/6nfdvgbv7ug2p3omlsg5ab7uoq/ribujemobaxekoxananono.pdfIn PDF document text
    • http://ziconiavip.com/uploadfck/file/tobinorovek.pdfIn PDF document text
    • http://fletcherfamilyreunion.org/clients/52745/File/pevopeziburesavix.pdfIn PDF document text
    • http://grapes4u.ca/sites/all/sites/grapes4u.ca/files/84610206083.pdfIn PDF document text
    • http://nextgenship.net/upload/file/20210723162700610577.pdfIn PDF document text
    • https://kibledergisi.net/resimler/files/vonigukeriz.pdfIn PDF document text
    • https://churchofgodinjamaica.org/app/webroot/files/83630385386.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608a2070d52d2---toduwaforivubuwuditenidi.pdfIn PDF document text
    • http://teacherandtraining.com/coj_u/KK/userfiles/files/gakojomate.pdfIn PDF document text
    • http://kimbuunguyen.com/uploads/userfiles/file/1336585918.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=phantom+2+vision+plus+user+manualPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF2A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF741 10804 bytes
SHA-256: ae590e30b424ef521db3276ae8f1e2ba79a80c0aeff72f4340be182bbcb0a9d9
font_02_sfnt_off00011006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11006 20124 bytes
SHA-256: 4249b5a85ef2b2b5a019901d957df47e543017e662ad6fb067c0350a90e336d3