Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab0ff21ef005e08d…

MALICIOUS

PDF

70.3 KB Created: 2021-07-18 21:19:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c3ada16c6066b153bafcf4469a7ae9c9 SHA-1: ce8b9d8b7a651ea39c206e664e3b355fe70e5180 SHA-256: ab0ff21ef005e08df590ad9bedb462967a35de60ce09c10c59b0614d2dd0c562
154 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs pointing to compromised WordPress sites, indicating a phishing or malware distribution attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this malicious intent. The file's structure and numerous links suggest it's designed to lure users to external, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6664

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 https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/c08945355b3d2c26afcb84b39172011e/3386490768.pdf In PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16093f40f30f87---18729768320.pdfIn PDF document text
    • http://agt.es/files/galeria2/files/57935510241.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/baxug.pdfIn PDF document text
    • http://carrollcountylawyers.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pefizubulegidabefod.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/751a9598f71a1ef3401fb99839fd0b83/wogozo.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/de479c47efbc21b2516bb94d0a355138/vusopezikuj.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1b9550ed6---zegexefekutad.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160dd837c9bdf8---13158844949.pdfIn PDF document text
    • http://charivne.info/images/file/basowineruvinewa.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/160979ce88f768---rugumural.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/dojekamujeresubo.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/5065b0451d3fbb262ccfe63b28ba3ea5/84368219121.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/1e2289f2ed933f98cfbf8b2bba150f0a/xosazowadipal.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/f630cc03df750ae87370a86c9956ff96/94484589236.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fdab213892---60582581568.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca1a9e5d64---89110162875.pdfIn PDF document text
    • https://aarhuskortet.dk/images/file/1984388102.pdfIn PDF document text
    • http://bulk-supplies.com/userfiles/file/66239803563.pdfIn PDF document text
    • https://k-barrierfree.com/FileData/ckfinder/files/20210618_57B35960ED768358.pdfIn PDF document text
    • http://crackershrimp.com/file_media/file_image/file/34680647168.pdfIn PDF document text
    • http://vita24h.com/uploads/userfiles/file/20742858275.pdfIn PDF document text
    • http://kristenpell.com/userfiles/files/jubasim.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=fl+studio+not+enough+asio+output+channels+availablePDF 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_off0000d2d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D4 18532 bytes
SHA-256: f90dd7a106794084f7ac4337a5ba8c1c867649277e5bedbfa0c88e43728fc3a3
font_01_sfnt_off000102c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C1 10976 bytes
SHA-256: 62626f01bb9b48b8adbde3b17b0a52f840bfd4eb319d9fba4b50fa16fb41744a