Malicious PDF — malware analysis report

Static analysis result for SHA-256 c48c3cb178cb201f…

MALICIOUS

PDF

70.3 KB Created: 2021-09-06 01:42:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: bf29be489b5d12dc70d612c362cd126c SHA-1: c4a0ff7da707628993dcbc32f831a3b6f632159d SHA-256: c48c3cb178cb201f8b16bc5c5c1d25924763f3e4be1fab69cccaf67698cf097b
154 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to multiple disposable domains and compromised CMS upload directories, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of numerous embedded URLs, many of which are unknown or hosted on suspicious domains, supports the conclusion that this document is designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6872

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 http://inlovehuahin.com/file_media/file_image/file/60516197204.pdf In PDF document text
    • https://begili.com/uploads/image/files/migiligovu.pdfIn PDF document text
    • https://patidarpalanpur.com/web/k/main_admin/ckfinder/userfiles/files/13938475653.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b5fb145cce8---suzivogor.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/e1c3f65d161ae86f0852bd6fb38f6b08/mafelavejogofef.pdfIn PDF document text
    • http://ijfbn.com/editor_up/fajukulelesiziga.pdfIn PDF document text
    • http://osoboebludo.com/ckfinder/userfiles/files/kekoxe.pdfIn PDF document text
    • https://pmeds.us/userfiles/file/mizebij.pdfIn PDF document text
    • https://digicpictures.com/downloads/pukolevese.pdfIn PDF document text
    • http://yangpupark.com/uploadfile/files/lubowegowedomuvida.pdfIn PDF document text
    • https://turismopontevedra.com/ckfinder/userfiles/files/65289632553.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/ihjjlib1svtbh9644po9o7vo47/sosutediwuzowodupunoz.pdfIn PDF document text
    • https://laplacedesstores.com/upload/file/xidulabomewujimow.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160984adc2e970---21194470638.pdfIn PDF document text
    • https://carmelocuritiba.com.br/ckfinder/userfiles/files/18316817870.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c9918b5b795---robolutusidera.pdfIn PDF document text
    • https://xn--arbeitskndigungsrecht-best-5zc.de/userfiles/file/60279551134.pdfIn PDF document text
    • http://wingprocess.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/59914965688.pdfIn PDF document text
    • http://eksan-ltd.com/userfiles/file/fodiwetep.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607225614d73c---71826911925.pdfIn PDF document text
    • https://burgaseguros.com/userfiles/file/bunekepewexero.pdfIn PDF document text
    • http://ping-property.com/user_img/files/zexonisigip.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/47397363660.pdfIn PDF document text
    • https://dbmotorbrokers.com/userfiles/file/perosurevarefoduma.pdfIn PDF document text
    • http://location-venise.com/italie_documents/files/79640021344.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=hammerhead+go+kart+parts+manualPDF 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_off0000c2cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2CC 10932 bytes
SHA-256: 56c97319c0d4a9d30a06c92d28754a2b606c7b415a488be7e19dc71cb645d97f
font_01_sfnt_off0000dbb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB6 17856 bytes
SHA-256: 1921215e113e43aa37b620388807b3a59918193779cb4a9c522b15ca02956bcb