Malicious PDF — malware analysis report

Static analysis result for SHA-256 f790b674a573f67d…

MALICIOUS

PDF

78.0 KB Created: 2021-08-09 04:50:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: da17a789fcc8ce2e8ff4f28a7dc6c3df SHA-1: c1c8cecb209f93884f1487a9054a1b59089f7937 SHA-256: f790b674a573f67d19d65281fae1fee12a6ccb28971fe1ffcbe50866fdc6c3bc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or trojan threat. It functions as a link farm, directing users to multiple distinct hosts, many of which appear to be compromised WordPress sites. The embedded URLs suggest an attempt to distribute further malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5474

Heuristics 5

  • 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
  • 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://bc-arman.kz/ckfinder/userfiles/files/96444419870.pdf In PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c8742270700---zamine.pdfIn PDF document text
    • http://tehnicgaz.eu/files/file/vamowu.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d24b0c7a1e9---73519632517.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609ebcf4d8ce1---nosizu.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba92cd18660---11550478234.pdfIn PDF document text
    • http://bodymindspiritconnection.org/clients/5/53/53f1eac0d8ee32431a47b4e1af774f29/File/gobizubobiganadakumamut.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/semas.pdfIn PDF document text
    • http://greenbrier101.com/userimages/xenugaxovebejanukufavafan.pdfIn PDF document text
    • http://open.ua/uploads/ckeditor/files/89128688892.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608382ba992ed---dakesobiriwejukade.pdfIn PDF document text
    • http://avondale61.com/clients/e/e2/e25739fb73bf6f2fbed92e75d980d6c5/File/75268689335.pdfIn PDF document text
    • https://tortugafilms.ca/adminfiles/file/vibaropinoramidu.pdfIn PDF document text
    • http://valeneighbors.com/userimages/95901267459.pdfIn PDF document text
    • https://sayurhijau.com/contents//files/vabotesaxedagaduvajazu.pdfIn PDF document text
    • http://righetti-ticozzi.it/userfiles/files/71542417561.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/7074e40530812ddd680d7e6d764a2f75/wuwek.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/16070854323dfa---pusezadotozodaz.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1609808bdd6d3e---kolaberanowegogomebafute.pdfIn PDF document text
    • https://cplastik.cz/data/cms/file/40558914700.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fd0695b7357---dozenotaguvuwidebavofu.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/16080982910e00---22672405107.pdfIn PDF document text
    • https://savitravel.ro/ckfinder/userfiles/files/diniporigugox.pdfIn PDF document text
    • http://eltdb.com/UserFiles/files/51083589105.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=what+can+contaminate+drinking+waterPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF44 10772 bytes
SHA-256: c66cd8b3c4e9bd61e6a25f31aa5c6505d1d475eb353c1db5b9795f3d4f64c672
font_01_sfnt_off000107b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B8 17768 bytes
SHA-256: 98b0ab7348f1d092f068ccf052b7caff079db8f769c77f9c19b3b7a5f23045fe

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