Malicious PDF — malware analysis report

Static analysis result for SHA-256 b90679d105231000…

MALICIOUS

PDF

72.1 KB Created: 2021-07-31 11:43:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0b6567d7280d59f74857efb7a461a92c SHA-1: 32aa5dfe19a89fef656a705d42600618df030ab0 SHA-256: b90679d10523100091cd907ff96a292e6ae1d6e15e7fefd2a3c85ed7bedcb5c8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting, indicating a link farm designed to redirect users to malicious content. The presence of external URI heuristics and the overall structure suggest it's intended to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6736

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://smidgel.ru/uplcv?utm_term=diablo+2+pluggy+mod+1.14+d
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/45adf86fe191a354c8a8121e84c6ec15/tawitofudanezodelidojur.pdf
    • http://richardarnoldalumni.com/clients/a/ad/ad1dcfa6f69ac51e3fe6bec18f6cf6d6/File/rixoverawezusajaxow.pdf
    • http://thegioituigiay.net/uploads/files/xakunopuwigezu.pdf
    • https://almuhja.net/ckfinder/userfiles/files/gipupokerigenapipe.pdf
    • http://praguetransfer.com/files/file/50857822111.pdf
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/4859dfac782d1d17b41aac1629e50687/jefiwetonedapoxat.pdf
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16088ea434d07f---zodokulenugamuji.pdf
    • http://harringtonandlombardi.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/guzosesuvoxujufuni.pdf
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a05dbc7f994---sexapapowew.pdf
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c38cc30ab70---71940369423.pdf
    • https://securityguardsupply.org/php/uploads/file/90263490636.pdf
    • https://accuratesearch.com/userfiles/file/wufogejasafovom.pdf
    • http://taskentcompany.com/userfiles/file/71918398581.pdf
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/8704f38766de308e7ced2c2210471195/85886402424.pdf
    • http://ekachaiguitarist.com/ckfinder/userfiles/files/gubozefelotituteritob.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079853554e9c---37337550535.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/fujq1i8tu9577fq0hsfrar42k6/dorivaz.pdf
    • http://thsport.dk/ckfinder/userfiles/files/dupimedovopajura.pdf
    • https://michelbarbot.com/upload/files/zadozifiriri.pdf
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/ca34e425c6581bb7004c87f6aadf3d41/16640916234.pdf
    • http://hanasushichoice.com/uploads/files/79214807246.pdf
    • 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_off0000ea9a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9A 16792 bytes
font_01_sfnt_off000102b1.bin
f312f4ea90ac2c8f68bfbd4d862c6903502f58fe83a222f339357510dbb8630f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102B1 10804 bytes

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