Malicious PDF — malware analysis report

Static analysis result for SHA-256 223319b1c2c3860c…

MALICIOUS

PDF

78.2 KB Created: 2021-06-21 07:53:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 3113b5fe20a46e9d3966a2a1e0a89989 SHA-1: e92f21316f72c2d695eaccac28270aeb7445f9df SHA-256: 223319b1c2c3860c0bf87bbd52e3eebf4d01e68034cfccd4ffea362ff7e23559
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs pointing to PDF files hosted on compromised websites, suggesting a phishing or SEO poisoning campaign. The embedded document body text is heavily corrupted, preventing a more detailed analysis of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8900

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://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/3952b5b4e8df3c89fb8196cbb0fda0bb/dodapudaxutorazez.pdf In PDF document text
    • https://daquin-ferriere.fr/userfiles/file/32423579128.pdfIn PDF document text
    • http://playeasypiano.com/resources/fck_images/26179572603.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/a2ac371772e16f79fcee2c840acce6ed/vusapatox.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/f756b8abfc08d0fd81ed6efea010d268/17375733953.pdfIn PDF document text
    • http://colorfusion.us/admin/images/file/30149268751.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/48facisf41l01vedfbcrpha7ks/43877423509.pdfIn PDF document text
    • http://martonaroniskola.net/userfiles/file/borufisukaxideki.pdfIn PDF document text
    • https://andrejc.si/files/file/texifodogososom.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b36215e6e---fopodopenidipudo.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/3c7fcb4f9f894dc83fec63f942b466a5/fubetirifawonisigid.pdfIn PDF document text
    • https://roeveragri.ac.in/wp-content/plugins/super-forms/uploads/php/files/a78591d7a7ed6b0ce06229e6c3725465/fapaxasajijadoj.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c2e3386db7---56289047866.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160b1f0b315b85---sulebejo.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16096f120ed3cf---70116928030.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/bc0c0e27cf63372375a2c955ea74d996/88452857914.pdfIn PDF document text
    • https://puppometalli.eu/file/12214466737.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/86b83ff4f00ecdcf4ca6206f5dc69d60/vowadopuvowekine.pdfIn PDF document text
    • http://geniuschulatutor.com/userfiles/files/narewamupisirefe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=counter+blox+aimbot+and+esp+scriptPDF link annotation
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC5 6744 bytes
SHA-256: b29f9350a720d2da9dc50567d08c4a82684db1fcb28a47e3a5788345b392d808
font_01_sfnt_off0000fbaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAA 5332 bytes
SHA-256: f3d2e9f828e5bbe431331d9df7b6eadc0dd91276e4e0fe497e219af92e44fd81
font_02_sfnt_off00010da1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA1 2640 bytes
SHA-256: 60ce8b9bb06e0ef675727ff71196006a1d1252686513e53b8621ce6a9de6e4ea
font_03_sfnt_off00011930.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11930 7520 bytes
SHA-256: 2c33c8f237b6ffdae07847e215648f5686cd20b534049077fff6ba8dff5814a6