Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9f73cea155e6203…

MALICIOUS

PDF

78.1 KB Created: 2021-09-02 12:56:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 8f45a19ae93b6d977b4e4cc50f044455 SHA-1: 7aba132d79fa6fce19904ba8a9db8f6e032a8336 SHA-256: e9f73cea155e6203d921297ef364dc33243c25f305a256c7b4a33e7bc95c4d82
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3497

Heuristics 5

  • 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
  • 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=english+grammar+lessons+sinhala+pdf+free+download PDF link annotation
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/0e09bd267f1597bb7bd27547bd956117/ralidemevaj.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd8f2461705---87055814607.pdfIn PDF document text
    • https://abicecream.ru/ckfinder/userfiles/files/kivotijokonade.pdfIn PDF document text
    • https://osiindia.org/ckfinder/userfiles/files/25057536006.pdfIn PDF document text
    • https://tenekedjieva.com/uploads/file/kowijujupob.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/f3e37d5b7937f798dd4d030d02d7c2fd/85823688225.pdfIn PDF document text
    • http://harchovyk.com/userfiles/file/xalarijutubomigo.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/malik.pdfIn PDF document text
    • https://idd.no/ckfinder/userfiles/files/28250923799.pdfIn PDF document text
    • https://kawanmto.com/contents//files/poxipatef.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607590d86a2a3---63709816131.pdfIn PDF document text
    • http://www.gleason.com.au/application/third_party/ckfinder/userfiles/files/90435368225.pdfIn PDF document text
    • http://pvhs1980reunion.com/clients/e/e5/e5e9f74eb83211af097e98bf68d59c4c/File/juvur.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/9ocr1tp33rhubd254mt8e4bmv5/motisesesezorasakulujubo.pdfIn PDF document text
    • http://sun-eko.eu/files/file/39366390594.pdfIn PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/47524542145.pdfIn PDF document text
    • http://veno2.com/upload/kojilokezojujusaxi.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160b836955cdb5---suzep.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/zomimikikapavup.pdfIn PDF document text
    • http://cesmclassof68cheyennewy.com/clients/82478/File/77947180364.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16075519f81507---vawomikilamubejozozigukeg.pdfIn PDF document text
    • http://jhdjt.com/images/upload/File/13342044713.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160808c62ce71a---lofiti.pdfIn PDF document text
    • 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_off0000da19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA19 10916 bytes
SHA-256: 8c90a14cb97dae014c66878b42afa6ffec0ff8b65c8b8bcef58e14af2b05e2d9
font_01_sfnt_off0000f2f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F3 20716 bytes
SHA-256: d67e1a9052ce44764303937870a7c2ff2c3ae744b5c872b83d2413697205825e

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