Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3b7c00f5a146a8e…

MALICIOUS

PDF

78.0 KB Created: 2021-09-06 16:25:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 66feea8f606053edd61fd6ecd917e607 SHA-1: 549235cd2cb9430d073d8e7c3b7e2c21d1ad102d SHA-256: b3b7c00f5a146a8eee253dd221a70af7c19421e39284f6b2c433d5642bfdca6b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it is likely a phishing or malware distribution lure. The file contains a link farm pointing to numerous compromised websites, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malicious content delivery scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7162

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 https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/2e3e27d7350b279fda09f4b647fc1d0e/50276772755.pdf In PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/57b3bac782c49c645843582f803fbc3a/53230034074.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/tifimugepaxa.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/tizikezufudoresabureko.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/09b2dd9ab0452801eb8dc6bd2c697899/62114414694.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/464a4a3310a65118b4aca5dfa807d568/zolasuzofuvesopovolamuzu.pdfIn PDF document text
    • http://prime-standard.com/piceditor/file/romexemupabasawibubuf.pdfIn PDF document text
    • http://otoozevran.com/resimler/files/nawobasefevexavuso.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/37072532798.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613566e0dea4a---vaxuv.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/l0ift53rmk9hchjqjdm43v6s78/31809352554.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160889c519fe24---66659582188.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/4426be33e6b2a31a492470dfba0835a1/gigejekupexibafebi.pdfIn PDF document text
    • http://toastwarenhuis.nl/app/webroot/files/userfiles/files/werajupasatopum.pdfIn PDF document text
    • https://budapestpainter.hu/ckfinder/userfiles/files/vilamovosopebosopulupate.pdfIn PDF document text
    • http://studiotecnicobergamaschi.it/userfiles/files/tajusiwufesovepukijuf.pdfIn PDF document text
    • http://donleroy.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/18800555701.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/3fcc8fbrg0esispj3m4gqqgl05/56465330209.pdfIn PDF document text
    • https://www.vpn-solutions.com.pe/ckfinder/userfiles/files/zuvubuvitutotolumamoso.pdfIn PDF document text
    • http://www.vinoplaza.nl/img/upload/files/zufowasabe.pdfIn PDF document text
    • https://searchlink.org/userfiles/file/vukuwebeweta.pdfIn PDF document text
    • http://hglobaltour.com/FileData/ckfinder/files/20210831_D641B1E0E1B561FB.pdfIn PDF document text
    • https://tidurmalam.com/contents//files/49291504541.pdfIn PDF document text
    • http://mjacz.cz/soubory/files/29191906341.pdfIn PDF document text
    • https://qqhanoman.com/contents//files/33525124633.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=futsal+history+pdfPDF 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_off0000e8c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C0 10552 bytes
SHA-256: f1ed3b5c4b780e5ccd37ce5f9cafd49c994e75aff55aaf9403239743de35f1c0
font_01_sfnt_off000100e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E7 18548 bytes
SHA-256: 8b1e48bcb61d332ed2d95317a8bc14abf3ad13006685206fa03ef70fb4b8fe6f