Malicious PDF — malware analysis report

Static analysis result for SHA-256 f52d4442b2accb6b…

MALICIOUS

PDF

73.7 KB Created: 2021-09-02 04:27:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c9bb0ecf245822798f77467369d3e5bc SHA-1: 6f9d216655ae1441fb7cb1db553bd8fb404b2309 SHA-256: f52d4442b2accb6b8fef54173158c2fd92ed904155ccf0c8254e7973754ad762
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains an embedded JavaScript stream and a significant number of external URIs, many of which point to compromised WordPress sites acting as link farms. The ClamAV detection 'Pdf.Phishing.Trojan-d2568dad23a94d95' strongly suggests a phishing or trojan distribution intent. The embedded JavaScript likely facilitates the redirection or further payload delivery, contributing to the overall malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier clean score 0.2226

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://catamma.ru/uplcv?utm_term=wow+mage+leveling+build PDF link annotation
    • http://yourhealthyanswer.com/ckfinder/userfiles/files/kurimif.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160766907e8ae4---vuganafezinelofi.pdfIn PDF document text
    • http://carnow.jp/js/upload/files/13614032670.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/f734cac62b547f71d014f382b615b5f9/zuzukafosegamavor.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1612ce4fb79c90---wotudufitelurewavi.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/ba78cf2b7efd39bd98cc7056ecd8af63/26774715454.pdfIn PDF document text
    • https://tort-art.ru/userfiles/file/repovatilonunasitonip.pdfIn PDF document text
    • http://cravaluos.com/ckfinder/userfiles/files/mafugaxof.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/3022983830f054cf3945e8b695a69cd6/68203084085.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/5ce94af84a1eae0bc59b0183679fbd93/biketeratiraderexowusul.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/a4e9493633a14a8b1e6491810c5d7231/wujiregazaj.pdfIn PDF document text
    • http://pwmtqatar.net/userfiles/file/siwimi.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/9ed511a213410b83c55d3becb70f8f4b/10676093104.pdfIn PDF document text
    • http://x-site.by/upload/editor/files/60235656466.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/9bd9ac967cd6b9603e8926267381dc2c/novujazolatumagu.pdfIn PDF document text
    • https://welltowork.org/wp-content/plugins/super-forms/uploads/php/files/33bf2c978de884e7f6fdf4181a1dbb29/lufewonomosidukos.pdfIn PDF document text
    • https://weddingitaly.jp/images/file/21631104113.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/324d56aa783677c6f105affe365142e7/rozokedog.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160806f76f1161---97403236979.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/728a493d0abb1ff013dbded1f01542d0/bepopomegovugisumugotisem.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/ho8gonesoq6v1jh11huaoa944k/gegakorok.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/86528551905.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089cc9d56b78---deneva.pdfIn PDF document text
    • http://a-swiss.com/upload/userfiles/file/zakitifusezosifono.pdfIn PDF document text
    • http://gps-tw.com/CKEdit/upload/files/metidemutew.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/91438900026822ea477ffe84248ee2f6/detuxagojuz.pdfIn PDF document text
    • http://caycanh.vn/images/fck/file/75778719280.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_off0000d032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD032 18040 bytes
SHA-256: 6cd58dfe01d11bbe8a11b58b736a16f1b463460a4c8d31cdcf180d431682715c
font_01_sfnt_off0000ff87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF87 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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