Malicious PDF — malware analysis report

Static analysis result for SHA-256 56706290cfe2bc54…

MALICIOUS

PDF

76.7 KB Created: 2021-09-16 07:06:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c97befa0c3fe6b9a9408deadc417d458 SHA-1: f5b88a70248be7db40c7bcbf97b5e7a638a96db6 SHA-256: 56706290cfe2bc54005682c592a4fd0844739446af70407cbea2443592cbe97d
124 Risk Score

Malware Insights

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

The sample is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to external sites, suggesting it functions as a lure or redirector. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating the PDF is part of a link farm on disposable hosting, commonly used for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7561

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://crewmak.ru/uplcv?utm_term=comment+annuler+une+mise+a+jour+android
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16135585e71a0a---52143899643.pdf
    • http://hkwwta.org/userfiles/44750467606.pdf
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16142893d8434b---feziluvepuvuviratatex.pdf
    • http://kleinschadenexpert.com/userfiles/file/tadubojedomovu.pdf
    • http://elsped.hu/files/file/49470604791.pdf
    • http://acecaalcoy.com/userfiles/file/55376063594.pdf
    • https://brs.jo/userfiles/files/xazaruje.pdf
    • http://mynotary.ca/sites/all/sites/mynotary.ca/files/jesutafarekonat.pdf
    • http://stroytehcentr.ru/images/file/rebesosesifunedekow.pdf
    • http://indecomavo.pl/userimg/inc/14605450348.pdf
    • https://indoshaolinkungfusociety.com/ckfinder/userfiles/files/57602644703.pdf
    • http://quaisetoiles.fr/img_pages/file/zakovusibimarexetid.pdf
    • http://studioguidobarbieri.it/userfiles/files/99241180567.pdf
    • http://ifap.it/images/file/86118659504.pdf
    • http://aibasylhet.edu.bd/app/webroot/ckfinder/userfiles/files/90627585449.pdf
    • http://thaifilmind.com/UserFiles/file/nirekujusudowisos.pdf
    • https://santa.my/images/users/00000000/files/wozejejugidor.pdf
    • https://reazfarah.com/ckfinder/userfiles/files/36121554643.pdf
    • http://auswallendorf.de/userfiles/file/wuvoz.pdf
    • http://jessie.vn/images/ckeditor/files/xuremuvofuja.pdf
    • https://mp2020.csysadmin.com/ckfinder/userfiles/files/repesilefo.pdf
    • http://giaydantuongphongkhach.net/images/news/file/61898162573.pdf
    • http://andreaslasnik.com/data/files/59357095702.pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d804.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD804 16792 bytes
font_01_sfnt_off0000f016.bin
d2bfa1d3336a71477ca0ac3ae80a51176ebda8450e72923e8a622ecdfa6fb44e
pdf-font-stream PDF embedded font (sfnt) at offset 0xF016 19608 bytes