Malicious PDF — malware analysis report

Static analysis result for SHA-256 a275d516114860ee…

MALICIOUS

PDF

68.0 KB Created: 2021-09-21 06:28:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 996e2385757fdfb0da64f72a92f399cb SHA-1: 609d0b4b3b2bc0751a44c0262c2e37fed0c4f598 SHA-256: a275d516114860ee3478e99e4e3fd6ef75f30415adade1cc71a83c5b1ee31c7c
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. It also features numerous external URLs, including links to compromised CMS upload storage and disposable hosting, suggesting a redirection mechanism. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9130

Heuristics 6

  • 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.
  • 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://inwebjor.ru/uplcv?utm_term=marguerite+duras+moderato+cantabile+pdf PDF link annotation
    • http://av72-reklama.ru/userfiles/file/1631804016be0e32caa2e1fc7530b7.pdfIn PDF document text
    • http://100gastro.cz/soubory/files/44451772391.pdfIn PDF document text
    • https://idd.no/ckfinder/userfiles/files/22179121090.pdfIn PDF document text
    • http://irollee.com/userfiles/file/babikosujinar.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/068cb86a38c4e869a573af085ae8786f/wovowerorivokenobir.pdfIn PDF document text
    • https://yocarbroker.com/upload/ckfinder/files/litojidewuwivetenuwimo.pdfIn PDF document text
    • https://guineaservicesproviders.com/gsp/files/tufozafonilekenazukat.pdfIn PDF document text
    • http://daieimotors.com/js/upload/files/kunirajetove.pdfIn PDF document text
    • http://stefanourso.com/public/userfiles/file/xidaxuguzurunikajo.pdfIn PDF document text
    • https://pisausakti.com/contents/files/10650127128.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/zamewegoxawep.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/f2e83da699d7dc787e8b1fa5084969ae/43716198775.pdfIn PDF document text
    • https://martas.vodrsport.cz/uploads/files/jutev.pdfIn PDF document text
    • http://sin-hua.org/userfiles/41331208696.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/161407dbb6da10---juwewosonelin.pdfIn PDF document text
    • http://makeyourpartnermelt.com/userfiles/file/makuzibijimurulav.pdfIn PDF document text
    • http://crimesla.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lipixajawomofix.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/161470203c8721---41964890125.pdfIn PDF document text
    • http://yokohama-model.com/userfiles/files/61898021910.pdfIn PDF document text
    • https://medarbindia.org/ckfinder/userfiles/files/34228921821.pdfIn PDF document text
    • http://shriadinathbank.com/uploads/jagokipodunasejagoga.pdfIn PDF document text
    • http://aranysolyomfeszke.hu/editor_up/35584641979.pdfIn PDF document text
    • http://knshzj.com/CKEdit/upload/files/16767972266.pdfIn PDF document text
    • http://perevodvnegiloifond.ru/pict/file/lezomibijowaze.pdfIn PDF document text
    • 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_off0000ea65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA65 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.