Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dd2b759a34506bf…

MALICIOUS

PDF

77.6 KB Created: 2021-09-19 09:11:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 00970f17c304e1836a579e06df0e0868 SHA-1: a0e845abd6780e44100192d2fd5b30850b27a425 SHA-256: 1dd2b759a34506bf6b8bd861ef12da06faac56c708431ca5f1f53e3a1f0a5698
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable domains or link farms, indicating a likely attempt to redirect users to malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, identifying the document as a link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7561

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://sinoorchids.com/image/file/sexowosumi.pdf In PDF document text
    • https://clinicaabrahaoosta.com.br/ckfinder/userfiles/files/54286391942.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/f1c57cc19bb26e2df63705e83fb7c107/13804557413.pdfIn PDF document text
    • http://yourbuilding.ru/userfiles/files/52063575117.pdfIn PDF document text
    • https://fototipia.hu/files/files/18009154063.pdfIn PDF document text
    • http://studiorapizza.it/userfiles/files/miwagakevufewesikoned.pdfIn PDF document text
    • http://sherwoodchambergolf.org/ckfinder/userfiles/files/subojuwobuxijilovunajalaz.pdfIn PDF document text
    • http://abnig.friendship-match.com/upload/files/59618710199.pdfIn PDF document text
    • http://lepal.sk/ckfinder/userfiles/files/5426803811.pdfIn PDF document text
    • http://adria-ex.com/images/blog/file/lopekobug.pdfIn PDF document text
    • http://pillshop.ru/uimg/files/13954157323.pdfIn PDF document text
    • https://oxfordjsr.com/userfiles/file/lovevamutafewufujuzamige.pdfIn PDF document text
    • http://kechengchem.com/upload/files/96873061.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613b202015425---31400644213.pdfIn PDF document text
    • https://bhsbeacon.com/FCKeditor/file/4320136499.pdfIn PDF document text
    • https://anfauglir.com/images/file/69955918564.pdfIn PDF document text
    • http://mansiya.com/uploadfile/files/jowatomujavukusa.pdfIn PDF document text
    • http://bjzjygj.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/ruwumoxividusemegilinimuw.pdfIn PDF document text
    • http://peter-scherer.de/userfiles/file/dotupukasafaletedudini.pdfIn PDF document text
    • https://at1apigroup3.com/contents/files/20033850794.pdfIn PDF document text
    • http://apsencollege.org/test/fckeditor/file/gojojuvaz.pdfIn PDF document text
    • https://pacpartner.net/images_client/imagesfile/kubupaxoku.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=real+gangster+crime+unlimited+money+downloadPDF link annotation
    • http://alessandrotria.altervista.org/areap/ckfinder/userfiles/files/45079759451.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_off0000e088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE088 16332 bytes
SHA-256: 5cb55a0b7f687db204435db756f94b5ed6ab0433102bb551372e262da5acb5b9
font_01_sfnt_off00010ab6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB6 11056 bytes
SHA-256: 8284f634e3c89879357b637d9f43b0728773560a38c0bb102b220e3f0b669ccf