Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc2b1e60e039d5f2…

MALICIOUS

PDF

81.8 KB Created: 2021-09-11 03:14:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: a39d811e6073b278b8258f617eaa5be4 SHA-1: 336545bf752646cac8a7b0bd930a46398e334601 SHA-256: cc2b1e60e039d5f249834ebf20fc55983beab1144ea471ffb522981f9e8a2aa5
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is detected as a PDF phishing trojan by ClamAV. It contains embedded JavaScript and numerous external URIs, many of which are part of a link farm hosted on compromised or disposable domains. These links likely lead to phishing sites or further malware downloads, indicating a malicious intent to deceive users.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3497

Heuristics 6

  • 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.
  • 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://huntic.ru/uplcv?utm_term=the+best+emoji+app PDF link annotation
    • http://chiengthai.com/file_media/file_image/file/79198805502.pdfIn PDF document text
    • https://nusbetaja2.com/contents/files/86775655886.pdfIn PDF document text
    • http://oticonshop.com/ckfinder/userfiles/files/21020945465.pdfIn PDF document text
    • http://sunriverps.com/data/editor/file/vugojibezawereg.pdfIn PDF document text
    • http://ac-kenigsberg.ru/files/file/9045795545.pdfIn PDF document text
    • https://www.aukuras.org/ckfinder/userfiles/files/96942528608.pdfIn PDF document text
    • http://tomei4x4.jp/js/upload/files/44057225802.pdfIn PDF document text
    • https://xn--80aaa1arbfjoe3bzh.xn--p1ai/data/files/44404724430.pdfIn PDF document text
    • http://vinaaquachem.com/uploads/files/14721473837.pdfIn PDF document text
    • http://j1medical.com/uploaded/file/muwulirol.pdfIn PDF document text
    • https://euronuts2009.ge/files/files/sifelozabisavulo.pdfIn PDF document text
    • http://yogo110.com/userfiles/file/kegimutum.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/ob1sbrsjbtn9d60hcttljas6u0/48002856979.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/luwavafasojevovuzowov.pdfIn PDF document text
    • http://mitchelllawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zeperufujurivijixa.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/161315a967fca8---30971848514.pdfIn PDF document text
    • http://ozanatalan.com/iboard/includes/userfiles/files/bisudelukulupevit.pdfIn PDF document text
    • https://gmnavarra.es/ckeditor/files/rajojopaxofopu.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/1c9d2a539a1bec008cee70f972c5226a/14916017619.pdfIn PDF document text
    • http://ldkxzzs.com/images/userfiles/file/mawebevuwon.pdfIn PDF document text
    • http://metall-press.ru/files/87842780818.pdfIn PDF document text
    • https://websbag.com/uploads/files/befokakasok.pdfIn PDF document text
    • http://opuspointpartners.com/ckfinder/userfiles/files/xufolaxigaviwofesofajita.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_off0000eff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF4 10500 bytes
SHA-256: c5bcf2a1786e1d19780761a19ff8d8cd5d95ecd8729c7dd610ce30ad4973d19b
font_01_sfnt_off00010798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10798 17308 bytes
SHA-256: 0f20d85ae889b435dcad0675ac7e9246ac15330d05a4b3de103cc8dbb14fc4ec

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