Malicious PDF — malware analysis report

Static analysis result for SHA-256 4867c1b4c165a19d…

MALICIOUS

PDF

58.2 KB Created: 2021-09-17 06:49:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d0265fd6ddba90bc46956dc8898b8962 SHA-1: 81d17236ea57fb6f7260ec3909784a70529cad45 SHA-256: 4867c1b4c165a19d8d398ee673769e3e8d8cc4c0ef7e779ed8436eeac4d4fc33
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, including links to compromised WordPress sites and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware download sites. The embedded JavaScript is a primary mechanism for executing malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7288

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.
  • 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
  • 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://cargoservice.pl/cargoservice/userfiles/file/voxosamobu.pdf In PDF document text
    • https://bomando.bomsolar.com/uploadfiles/files/69722596657.pdfIn PDF document text
    • http://studiomarcheluzzo.it/userfiles/files/tibemofitosuxikumogi.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/lesomodeperugoketozikowuw.pdfIn PDF document text
    • http://cameradungphat.com/uploads/files/sowonuxumexogogekefamex.pdfIn PDF document text
    • http://www.azurwelcomeservices.com/userfiles/file/gegamizarumabewu.pdfIn PDF document text
    • http://tscyw.net/userfiles/file/20210901091526_y66p1m.pdfIn PDF document text
    • http://52963566.com/upload/file/202109090111316042.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613af94c2f4e0---duzekebozo.pdfIn PDF document text
    • http://sk-massimo.com/js/upload/files/37033896256.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/0a8630d711f69a5ead91e2fee0d4f941/tuxedidanefugorodozirone.pdfIn PDF document text
    • http://zdrowejaja.com/Upload/file/85236288227.pdfIn PDF document text
    • http://joesservicecenternj.com/userfiles/files/xarabene.pdfIn PDF document text
    • http://falconfam.com/ckfinder/userfiles/files/serijenabijoze.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/aevf1pue4ssbfin921tl3n93rd/97028384063.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bef8e88afc---mesurujupipavotopu.pdfIn PDF document text
    • http://lisaarkin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jividunumoxaxew.pdfIn PDF document text
    • http://bongoes62.dk/userfiles/file/10304203233.pdfIn PDF document text
    • http://pravkniga.ru/files/userfiles/files/20737205515.pdfIn PDF document text
    • http://globalsocialwlefaresummit.com/app/webroot/uploads/ckuploads/files/11434165418.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/qv105f1uggenl9upff1qeasfs3/niruzisemufivaxidomak.pdfIn PDF document text
    • http://nepalbestcargo.com/userfiles/file/manasilavaro.pdfIn PDF document text
    • http://sportingclubalbinia.eu/userfiles/files/dijokurisubedosip.pdfIn PDF document text
    • http://seghers.kr/data/editor/file/1411457892613dcef675edc.pdfIn PDF document text
    • http://fusiongrup.ro/userfiles/file/fopewusaperiwog.pdfIn PDF document text
    • http://yetisirkaucuk.com/firma/files/67902126166.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=driver+booster+apkPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000befe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEFE 16896 bytes
SHA-256: bc3acc29c864f311d8eec82e3308fb4f157f96c9b0cdcd5d73e3b0206c98f159

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