Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d625d7e9970b908…

MALICIOUS

PDF

59.5 KB Created: 2021-09-08 12:22:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7e7d99bca21ce282f40598dc17633706 SHA-1: b50061d31bf1695d647708e0c8194a5b574827dc SHA-256: 0d625d7e9970b908d1e8f98bd52b01ae141876c915b3604289d3ba5bcbc43df6
124 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan. Static analysis revealed it functions as a link farm, containing numerous URLs pointing to compromised WordPress sites. These links are likely intended to lure users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4969

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://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16131b9894ed31---rurokudogonepotiwosose.pdf In PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/048f72b16513bac51d103c62f2409bb6/rekukabilowap.pdfIn PDF document text
    • https://koncnc.com/genelresimler/file/36106190996.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef94fdec80---pivijajijunazazanog.pdfIn PDF document text
    • http://burragebrothers.org/demo/jolie/beta/userfiles/files/66237930327.pdfIn PDF document text
    • http://indianmailbox.com/assets/images/userfiles/files/zikumewerexasoxisi.pdfIn PDF document text
    • http://massimosusto.eu/userfiles/files/93418874836.pdfIn PDF document text
    • http://impressivetravelvietnam.com/upload/files/61225368972.pdfIn PDF document text
    • https://mamadona.ru/ckfinder/userfiles/files/65799124274.pdfIn PDF document text
    • http://lepetitjaunais.com/userfiles/file/basobomewakux.pdfIn PDF document text
    • http://thanhcongtechtra.com/upload/files/92769987853.pdfIn PDF document text
    • http://dinobajka.pl/Upload/file/23695428719.pdfIn PDF document text
    • http://bularz-auto.pl/images/userfiles/file/22563756834.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16132c3367a47e---fakorenudufawitazozena.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613864cc5e51c---jisog.pdfIn PDF document text
    • http://residencelesaline.it/userfiles/files/82282874618.pdfIn PDF document text
    • http://alompar.hu/uploads/content_files/files/lajasuzu.pdfIn PDF document text
    • http://gamboeng.com/assets/ckfinder/userfiles/files/48246487207.pdfIn PDF document text
    • https://alternativecarrepair.nl/userfiles/file/domavegabige.pdfIn PDF document text
    • http://ladispensadicampagna.it/uploads/assets/file/54885581638.pdfIn PDF document text
    • http://hocomesun.com/upload/mepowomorekovanoxobevetu.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/8be6097efe1116b51bf4bc8144cd576e/98849787593.pdfIn PDF document text
    • http://spbmedaks.ru/sites/default/files/uploads/74983532699.pdfIn PDF document text
    • http://www.vegagastro.pl/upload/file/94217527336.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=bible+study+on+love+of+god+pdfPDF 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_off0000bc32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC32 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD449 10884 bytes
SHA-256: ece38be82b65bf595a9ef8624035cc24a869b4f05058a0acebff79ecd5f7a544

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