Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fec978f9da7e127…

MALICIOUS

PDF

112.0 KB Created: 2021-08-25 04:21:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 92e2d38ffb9a51482e399d0b899ab7ce SHA-1: 144acc9b391b9e6d7e30c8247028abdee118d77d SHA-256: 9fec978f9da7e1272ac0d102882d0a53ac221599c3616148fa7ed02e8189a2b7
154 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with many URLs pointing to compromised WordPress sites, suggesting an attempt to lure users to malicious content. The document body was unreadable, but the presence of numerous external links and the ClamAV detection strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8991

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 http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16087af8d64b38---malerabofolatife.pdf In PDF document text
    • http://ithaca1962.com/clients/41687/File/89424465187.pdfIn PDF document text
    • http://dentherapia.hu/files/file/fufasikomaza.pdfIn PDF document text
    • https://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/45245391581.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/acb12946ec2efd1616889b8d3533e53c/bofanemedilavuwe.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160983033d224a---nozarepimu.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/0r31dmh355hnk6eivvm89s9eq5/jikowerup.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4e6a6d47f9---liwexagilulip.pdfIn PDF document text
    • http://entryexpress.online/chapter_images/files/69757990418.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f7f1a92b34b---mapimofege.pdfIn PDF document text
    • http://carneslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/7727955903.pdfIn PDF document text
    • https://chambredhotes-savoie.com/ckfinder/userfiles/files/xeboli.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/16070b4c23e7fc---juvuworewilagomaja.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085f12dc8fc3---loliveratu.pdfIn PDF document text
    • http://liqaa-lb.com/files/userfiles/files/kemikasid.pdfIn PDF document text
    • http://maketmaster.ru/admin/ckfinder/userfiles/files/matoruvirazol.pdfIn PDF document text
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/9e3b325c2cbcdae39fa2a8b51d5e0773/2647584410.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/16105d2c76510e---sibaripixujefesaju.pdfIn PDF document text
    • https://monyetjoget.com/contents//files/14496845530.pdfIn PDF document text
    • https://ozmutludokum.com/userfiles/file/67280846846.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/e4g7judshuacs2pacl646es3p1/33707157455.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/d19311055fff19ccbf19ea485b6e8a9d/wumusom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=mickey+rourke+first+plastic+surgeryPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019ca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19CA1 10852 bytes
SHA-256: 58d3fd362a1b68aab38880e76e78b3fc3a12cd7172f53504b5001d181cf10980

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