Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed7963383df7125d…

MALICIOUS

PDF

74.9 KB Created: 2021-10-05 03:37:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 913feb1de49ccfebb6fc09b8be3099cb SHA-1: d0268c53500bbe677fb9647c3ecc2313edb7e6c7 SHA-256: ed7963383df7125dc9e87b1919a961213565d143402613f6c3e22a54cb74affa
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document was identified as malicious by ClamAV, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS uploads. The document body is heavily obfuscated and unreadable, suggesting it is not intended for direct user interaction but rather to facilitate redirection to malicious or phishing sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3916

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://minipit.com/data/files/96735635931.pdf In PDF document text
    • https://www.habitat-morvan.fr/ckfinder/userfiles/files/namono.pdfIn PDF document text
    • http://interface-referencement.com/userfiles/file/36517473011.pdfIn PDF document text
    • http://verkaufs-akademie.com/userfiles/file/zapabiva.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16142945cb81d9---24590272506.pdfIn PDF document text
    • http://louisamerino.com/userfiles/file/81743857629.pdfIn PDF document text
    • http://usagimatur.com/files/others/xipesebabexewawe.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e8ae1ce05d---4556964622.pdfIn PDF document text
    • https://ikincielinmak.com/upload/ckfinder/files/1273734236.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/2e0aeff2dc4a8ff554d8854515a8a6ac/36815653558.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/d9eca6765bfd5a4022e8407b4fa87298/74777949849.pdfIn PDF document text
    • http://tageedesign.com/ssmpt/documents/file/ravoroge.pdfIn PDF document text
    • https://valenciamaids.com/userfiles/files/tozaz.pdfIn PDF document text
    • http://zhfangyuan.com/uploadfiles/files/91181359545.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161316e42ad914---rojabemenefevifavamekaf.pdfIn PDF document text
    • http://xboxheerlen.nl/userfiles/file/4658910009.pdfIn PDF document text
    • http://millionsdiscount.com/mo_images/files/robuwesemo.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/81340379918.pdfIn PDF document text
    • http://diamantina-joaillerie.com/ckfinder/userfiles/files/wewemuxodanofirur.pdfIn PDF document text
    • http://musicfriend.vn/public/default/ckeditor/files/20830305519.pdfIn PDF document text
    • http://yavuzselimvakfi.org/resimler/site/files/25044759042.pdfIn PDF document text
    • http://rulife.ru/ckfinder/userfiles/files/57039403846.pdfIn PDF document text
    • http://hometextiles-consultant.com/ckfinder/userfiles/files/majemixejemaboxupokonawun.pdfIn PDF document text
    • http://rurisnet.org/images/file/26177175745.pdfIn PDF document text
    • https://ehlibeytalimleri.com/resimler/files/varare.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=migration+in+geographyPDF 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_off0000e263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE263 10424 bytes
SHA-256: 06f783212531d354c02227970a16e6c4348cb71d56d21fb1438cec2242f403e5
font_01_sfnt_off0000f9fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1