Malicious PDF — malware analysis report

Static analysis result for SHA-256 f38032956626f15f…

MALICIOUS

PDF

74.9 KB Created: 2021-09-06 02:35:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: efa40776373017889c233784b44913ce SHA-1: 3b05860ceebf300620bb4d072913fecd80ac405e SHA-256: f38032956626f15f680116ed4fcb75f4b69f186d8306224dd77bce7fe3c83201
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated maliciousness. It contains numerous links, many pointing to disposable hosting or compromised CMS upload directories, characteristic of a link farm used for phishing or distributing further malware. The presence of these link farms suggests an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6148

Heuristics 6

  • 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://belloverde.net/emailer/file/xebigokisapezam.pdf
    • http://nail-free.com/ckfinder/userfiles/files/gekukuwenakujomoda.pdf
    • http://bobiniauto.com/userfiles/file/90187960706.pdf
    • https://bakotech.at/uploads/ckeditor/files/favalunevapubedalitu.pdf
    • http://verduciautodemolizioni.it/userfiles/file/97884461936.pdf
    • http://qiuyutv.com/userfiles/files/20210811115940.pdf
    • https://smartmedia.ro/app/webroot/files/userfiles/files/fulotujotasa.pdf
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2a757ad802---kupejowatopa.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613250dc6da99---50927367405.pdf
    • http://webinaris.biz/ckfinder/userfiles/publics/files/dukiwebipetikeli.pdf
    • https://defaico.com/d/files/31824255534.pdf
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160859dab99eee---8426271782.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612a18da8a733---ravuxorokon.pdf
    • https://contabil-fiscal.ro/mm/file/xitafave.pdf
    • https://haysalon.com/public_html/userfiles/file/65528081419.pdf
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611d9d2093dd4---85227127126.pdf
    • http://dfwarbitrator.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/worojif.pdf
    • https://tekartltd.com/upload/files/26670267525.pdf
    • https://ludifrance.fr/userfiles/file/74193014382.pdf
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/6kk5gq6erccggdb03cabi49943/mefeloz.pdf
    • http://1qjd.com/upload/files/2021-08-26-12-42-34-1WFH4krb.pdf
    • https://chsins.tw/uploads/files/202108300320228404.pdf
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608fbb9ae5449---36844316550.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=irregular+nouns+singular+and+plural+worksheet
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca8b.bin
f1a259182e7654de719de217deede7c1836852e4bab263bba9bd3ffe35342501		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA8B 17224 bytes
font_01_sfnt_off0000f72c.bin
ecf562f211f5a237acb553d6f1e78e1b2b6e889e197e331b9eab7cf2bfe052ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF72C 10900 bytes
font_02_sfnt_off0001102c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1102C 16792 bytes

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