Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccd2c92406bed26a…

MALICIOUS

PDF

73.4 KB Created: 2021-09-03 05:46:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: eabca48310c8a4b6ee0e0085b21923b5 SHA-1: 68e11b4cc3ce3899c52273a49ed4d79d49cee8a3 SHA-256: ccd2c92406bed26a1864e37bf8a30a543860863e78d67134d21c0abc1b10e588
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links to external websites, many of which appear to be hosted on compromised or disposable domains, suggesting a link farm or phishing lure. The presence of embedded URLs and the overall structure indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9283

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://scuolascifondocortinadolomiti.it/userfiles/files/kowuxojikikimosegudagi.pdf In PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16071cdd7e41d4---89194464196.pdfIn PDF document text
    • http://x-site.by/upload/editor/files/30801464898.pdfIn PDF document text
    • https://nanyangtextile.com/userfiles/file/90851464891.pdfIn PDF document text
    • http://healhumanity.foundation/userfiles/file/25094884767.pdfIn PDF document text
    • http://siamsankyo.com/Uploads/file/6462907806.pdfIn PDF document text
    • http://hopkinshigh1961.com/clients/878968/File/bakasozobonamomede.pdfIn PDF document text
    • http://pro-elec.ru/ckfinder/userfiles/files/kadepejuxudakeko.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160f0975a3ad20---5188603538.pdfIn PDF document text
    • http://odnoklassniki-files.ru/images/uploads/files/33538015208.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608a6042423c8---rotitemulojogemuj.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/f67d7c9cbf8a83b98d865bc7ca8210a8/87227442025.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/541b1734fa820801bd913762b35ba3ae/rires.pdfIn PDF document text
    • https://balaji-technology.com/userfiles/file/gimipitowudaj.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b98ced01cc0---soroliwowozitidikul.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210502181558_1787223155.pdfIn PDF document text
    • http://isystem.hu/ckfinder/userfiles/files/19296080386.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd47003d7e---67102249435.pdfIn PDF document text
    • http://njnccualumni.com/clients/0/05/05b55d2c4c342460da0dc2f503861b12/File/bamajaponumisitedepi.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/f802fb9575992f4868ec8b7bb2acef63/82236852360.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/womujotaduzadozaxeniroge.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc86093cf0a---tajojepusivekaliresalenu.pdfIn PDF document text
    • https://tungqibiotech.com/upfiles/editor/files/xawumafawebej.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/f8145deaa3e3261890ce67a0e1e4a847/33752331351.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=clifford+odets+golden+boy+pdfPDF 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_off0000e3e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E8 10796 bytes
SHA-256: bb4ba327f281f4d64d3ba85c3741ebccbaa55333000a3c224aa1873c8e33b7dd
font_01_sfnt_off0000fc75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC75 18136 bytes
SHA-256: 778e356f29b3ff7dfa11a77f20b5b1bb4e65f04297405e2814d81342956648dc