Malicious PDF — malware analysis report

Static analysis result for SHA-256 98ed6140293aaf25…

MALICIOUS

PDF

78.1 KB Created: 2021-09-01 12:07:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7b4ef19b57946db5853f0aaabc8aabb8 SHA-1: d7c6ba8c32ff6862c7b9d77d80aee885867ec2f6 SHA-256: 98ed6140293aaf258458b6f041cdd37ac8ecab99a9bc30049201bfc8059eb37b
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites or disposable hosting. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a malicious intent. The embedded JavaScript likely facilitates the redirection to these malicious URLs, which are designed to host phishing content or further malware.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3485

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://pixomot.ru/uplcv?utm_term=nook+1st+edition+manual PDF link annotation
    • http://shop-exclusive.cz/userfiles/file/vavoburorefaginul.pdfIn PDF document text
    • http://ytovietnam.net/ckfinder/userfiles/files/ligudobejefepixime.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/f38fe0ffd75d3e3c8672c7a98f8f9945/papupenukulusijalesase.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/47184113700.pdfIn PDF document text
    • http://npxbyy.com/wang3_3_10_27/Upload/Upload/file/202161721296748.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607849bf6dca9---10124953830.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202105/file/97152512721.pdfIn PDF document text
    • http://ateliergermain.net/sites/default/files/file/kujipejoloxefedawexirofu.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099de065c742---30894786656.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/vgv70s32lfjp20puam1jdnmoq6/46628632675.pdfIn PDF document text
    • http://clinicaveterinariacene.com/userfiles/files/36230440230.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606f5894ca9eb---silalubevaturixinurafif.pdfIn PDF document text
    • https://indikino.com/ckfinder/userfiles/files/57097158674.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/gdfpkd5gee8q8u9qi5dgtsar77/gimudatubixesolilamokir.pdfIn PDF document text
    • http://ipceurope.com/assets/file/44831467543.pdfIn PDF document text
    • http://bahattinburyan.com/userfiles/file/zopuburudapemukaxoxugiw.pdfIn PDF document text
    • https://directorvincentchow.com/fck_filemanager_upload/file/83226048853.pdfIn PDF document text
    • http://moriefrusca.com/userfiles/files/wedabisoworesinijedinof.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160baf5093117a---25052790762.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f433bbf41b---41068451995.pdfIn PDF document text
    • http://datavincity.com/uploads/ckfinder/files/lomevazonizipigat.pdfIn PDF document text
    • http://carszana.com/image/upload/File/sasit.pdfIn PDF document text
    • https://www.theoakshealthcare.com/my_content/js/ckfinder/userfiles/files/5619723878.pdfIn PDF document text
    • http://93564497.com/userfiles/laxoluvozosedog.pdfIn PDF document text
    • https://accu-split.com/userfiles/files/gudenasikule.pdfIn PDF document text
    • http://asijskepotraviny.cz/files/file/9928753256.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a1a5b4ce1aa---81138891737.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_off0000ea0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0C 10532 bytes
SHA-256: 4263399f02fc9a2b803fe489aa3ffd9262dd2a7389cb669d89caec30168a07c8
font_01_sfnt_off00010212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10212 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1