Malicious PDF — malware analysis report

Static analysis result for SHA-256 30f11ba7db598de8…

MALICIOUS

PDF

73.5 KB Created: 2021-09-03 11:51:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7601d731fef7263cc35686820aa2ec70 SHA-1: f26fcb66cf172105745445821afdccd91a749581 SHA-256: 30f11ba7db598de825477f15507dd08fd0bc3286f5fa3ec4b9f7604e09bad333
124 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and exhibits characteristics of a link farm, with numerous URLs pointing to potentially compromised websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link distribution, suggesting an attempt to obscure the true malicious destination. The presence of multiple URLs hosted on compromised CMS upload directories further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3852

Heuristics 5

  • 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.
  • 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://hjtech.org/admin/upfile/file/16951431558.pdf In PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b6235f5d8d7---23596833510.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072b36faf91c---87820447418.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db1b2b5faf0---wezawi.pdfIn PDF document text
    • http://ferrogep99.hu/static/media/file/guvinoduribalita.pdfIn PDF document text
    • http://agriturismocorteerbatici.it/userfiles/files/75823844803.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/c22109166beb548e42da2fd3c23b4560/sesipatanedosexovisipubeb.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/6950d2b232aeaf093e6d4c9f28a86593/54889759657.pdfIn PDF document text
    • http://esthebel.de/userfiles/file/13461542223.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160acf4cfa368c---pazile.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/segepizide.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609e9f5e72c2c---fupakavekidilujifigoj.pdfIn PDF document text
    • http://bakoca.hu/files/file/40331370563.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/tmdis5r2ad8f9knf2oq6a09c95/xasinowevopu.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/rufoxofuloretukis.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e0e6d9369---42042369877.pdfIn PDF document text
    • http://ingpiazza.eu/userfiles/files/bolarusonewunepazifamike.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/648c2b386f40b0ff7bf95d0e97b53f6c/tinerubifaz.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/jk4md67qk9hjeoteeuug88b7ch/40670840127.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/78f14243cb05c981e88483a660006776/3176023407.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/v5rrgoj13k1lv9a7n451fqkl49/rowulogepudi.pdfIn PDF document text
    • http://sunrui-ti.com/d/files/63589998018.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160abf00366605---fuxaw.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/dc5f84b440c167375026e7380a0b4e29/61823464225.pdfIn PDF document text
    • http://crabandclaw.com/uploads/files/41032419138.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=homelite+38cc+chainsaw+manualPDF 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_off0000e080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE080 10952 bytes
SHA-256: 412b0471255eef7540c8f1fb60ae7ea18fcfcd1dd141c9cac78f2144c53bd0e5
font_01_sfnt_off0000f9c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1