Malicious PDF — malware analysis report

Static analysis result for SHA-256 d901f246b6ecb9e3…

MALICIOUS

PDF

67.9 KB Created: 2021-07-07 12:29:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 3670db529cd503ccbd39e63d833bb279 SHA-1: 00115994426d79e64ea6fc4cfbdc9c6ea2197496 SHA-256: d901f246b6ecb9e3005f6fc137d0ed2d16c22dddd7549d1ae9042a7571bfc58d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it likely serves a harmful purpose. It functions as a link farm, with numerous embedded URLs pointing to various websites, including those hosted on compromised CMS platforms. The presence of these links suggests an attempt to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5231

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://tl-systems.hu/files/files/nadimegegobokamabas.pdf In PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/l22v6cf9ab5uqjodf75ge623v9/21466607471.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609862bf9e85c---pomudavadasade.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bf3b3261462---tutadabefevab.pdfIn PDF document text
    • http://legalinet.eu/userfiles/files/93420272981.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16085b47800ce7---85088281868.pdfIn PDF document text
    • http://aptchasers.com/FCKeditor/userfiles/file/wujetoxusafag.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/f8409f8274fe39c5a6dd3e405868a3f6/20638926480.pdfIn PDF document text
    • http://northmarking.com/userfiles/files/71007602420.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/tm2mh1qt8rp7c39omr53l17et2/77331506773.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160701797a9bb8---lezoxejuvilar.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ea6bbbd61d---63975588077.pdfIn PDF document text
    • http://amsasecretariat.fr/userfiles/file/nakutokos.pdfIn PDF document text
    • http://aftckwt.com/uploads/file/5517135723.pdfIn PDF document text
    • https://autoradiator.mn/uploads/ckfinder/files/47782021246.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a2615f83427---sonibod.pdfIn PDF document text
    • http://gwhs79.com/clients/867100/File/4384764363.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/0a056a5a6b5c33a3df799357d1fb5e84/vebitopobenasezajifox.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/2ae451f934a90e1a60b049dc3aa58d2b/55084593824.pdfIn PDF document text
    • http://bycongroup.com/UserFiles/file/xuvevisupukojelivap.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ac4d16ef694---15699629374.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607614f22862f---43672860043.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160749f90849c1---xirujijajifozononat.pdfIn PDF document text
    • http://bsbcarpet.com/userfiles/file/56252791961.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/1jqdiaug99pji8j5a6h3o2afgr/lakonanobepex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=previous+year+gate+cse+paper+with+solutionPDF 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_off0000d44c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD44C 11020 bytes
SHA-256: ccd88ddde687b027ac47f220da2d718e87842e83a66e84d2e7d833d72c41a887
font_01_sfnt_off0000ee07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE07 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1