Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9e0faa1ef452c47…

MALICIOUS

PDF

76.2 KB Created: 2021-08-08 16:07:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 9d578d3b43bbef4b75f1bf23b4af5ee8 SHA-1: bbe407c6fc4c3b38d4c74d7a83f45e0a02f6e651 SHA-256: b9e0faa1ef452c47cec20ca5360cf9c912899ff94d918c6b85aaf0a42bfccfba
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains a link farm pointing to compromised CMS uploads and disposable hosting, suggesting it is designed to distribute further malicious content or phish users. The presence of embedded URLs and the nature of the heuristics suggest it acts as a lure, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9244

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://securitegenerale.tn/userfiles/file/zulegekivufeguvijet.pdf In PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/d5c01c5dd0b3b60fe0362b62daa5385c/21664118752.pdfIn PDF document text
    • http://consoles-a-gagner.com/fckeditor/userfiles/file/35600748370.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/161029be4686c3---tejagim.pdfIn PDF document text
    • http://rahway1968.com/clients/5/53/53e48f2724afc57738bbbcfbfdbdad27/File/dubivelin.pdfIn PDF document text
    • http://xn--80aatg4aaaddkhfhbf3evf.xn--p1ai/ckfinder/userfiles/files/34196109294.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1ac7f01c76---sapefibumomumodiburiso.pdfIn PDF document text
    • https://psiakocky-potisk.cz/webpagebuilder/ckfinder/userfiles/files/75845657555.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/99f936e63724bdf8c0cbd30f8bef63f9/kuxunirefopekomukekumoga.pdfIn PDF document text
    • http://dongphuctqueen.com/upload/files/32880483791.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/pitagufaridax.pdfIn PDF document text
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/2e83ei7qophdo96u801k8sohh1/fanasixirenisuperenoroxe.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/e8420d6f4180e953ff039015dcf318d8/23550769442.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1bcc5130f---95136207907.pdfIn PDF document text
    • http://rockhousemethod.com/ckfinder/userfiles/files/3484186665.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/7a7e0cee63ac906ebadf2839574a8bb6/8701314233.pdfIn PDF document text
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9420e9e7e---4070595794.pdfIn PDF document text
    • http://cnex.cc/images/blog//file/13955932765.pdfIn PDF document text
    • http://airelimpio.mx/img/editor/file/xizeziluwubaxil.pdfIn PDF document text
    • http://7seapharmtech.com/Uploadfiles/files/26527630360.pdfIn PDF document text
    • https://warsztatgdynia.pl/app/webroot/media/files/14845302547.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/74945a6961008811f73346f0afbb9bf4/judarubumexajiweraxufuloz.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c5b5967fb3b---xibafakanenejunawis.pdfIn PDF document text
    • http://dekogard.net/deko/veri/_files/zopolevexotafep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=como+baixar+autocad+vers%C3%A3o+estudante+2018PDF 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_off0000f0e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E9 18188 bytes
SHA-256: ea11ee6b933e3f239dba7ef1cce0c6d3d5ac80d699ec20861265b3ff31c3caa6
font_01_sfnt_off00011ddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DDD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1