Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb2b49273aae18c5…

MALICIOUS

PDF

61.6 KB Created: 2021-09-24 14:46:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4d3078c694a57fcc6a361324aa6b590f SHA-1: fd057c4ad5d9573f3b3c58f4d97432ad38354d4c SHA-256: fb2b49273aae18c5d7fc8abfed889a63917f1fc6224b5aadcdb4ffdf54c334fb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are structured as link farms. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using such links, often associated with SEO poisoning or phishing lures. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent. While no scripts were explicitly extracted, the nature of the URLs suggests the document's primary function is to redirect users to external sites, likely for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5156

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://livres-d-art.com/ckfinder/userfiles/files/kolapivugopiziras.pdf
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/de7b8fbf3e57e57db9c04194372e30ec/takegefewapikiz.pdf
    • http://fittbikese.hu/files/file/pininopalimopebopibapen.pdf
    • https://laptopserwis.com/app/webroot/media/files/kokutigugavalitid.pdf
    • https://fruitssupplier.com/app/webroot/img/files/63997725776.pdf
    • http://brandiassociati.it/userfiles/file/82003547666.pdf
    • http://bassbasement.org/userfiles/file/64057676685.pdf
    • http://runbo.net/upfiles/files/16305207184768.pdf
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/c17e09d7727bce729e7b4962b4a45904/kefagumasokodok.pdf
    • http://futboltotal.net/images/files/legudunogewanugamoro.pdf
    • http://leeclinic.kr/userData/board/file/40816524917.pdf
    • http://serenetour.com/image/upload/File/vomonadefezox.pdf
    • http://hifitness.hu/userfiles/file/danoxoxigidinazumalaji.pdf
    • http://inruho.ru/ckfinder/userfiles/files/6603624421.pdf
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613fb3664fabf---regewudutonabagupit.pdf
    • http://opusbiz.kr/data/editor/file/7630148936145dc671baca.pdf
    • https://shaplaconsulting.com/app/webroot/ckfinder/userfiles/files/wuvezutopusopovuris.pdf
    • http://gulfcoastlist.com/userfiles/file/53255685131.pdf
    • http://toyteepee.com/uploadfiles/file/210903150600750787dg271g.pdf
    • https://trimix.bg/UserFiles/File/jogun.pdf
    • http://risme.vn/files/jinopusebogikopujunaw.pdf
    • http://litho-and-co.fr/ckeditor/upload/files/77442665722.pdf
    • http://charugarware.com/DEVELOPMENT/charu_garware/uploaded/userfiles/file/nipipegimebiwikosepu.pdf
    • http://onlinemidias.com/ckfinder/userfiles/files/75726397537.pdf
    • http://sergeybazarov.ru/file/89787837400.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=stumble+guys+multiplayer+royale+download
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b3df.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3DF 16792 bytes
font_01_sfnt_off0000cbf6.bin
8014d9c4e77bb02d26013f56d90e67f375e48caa4cf0c56304a9c81f1e83690b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBF6 11252 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.