Malicious PDF — malware analysis report

Static analysis result for SHA-256 eda968571373a5b9…

MALICIOUS

PDF

83.2 KB Created: 2021-09-07 23:34:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: dd9bd3fb6bba8d7bf3d39e675f7bbc86 SHA-1: 6e184129afc2a465002396d5ab1521557542936f SHA-256: eda968571373a5b977d8dd81f6e2de9e9649d1c7a532f933771971466b088c5c
154 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to PDFs hosted on compromised WordPress sites and other disposable domains. This pattern suggests an attempt to lure users to malicious content, potentially for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5559

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://irlanc.ru/uplcv?utm_term=insolvency+%28voluntary+arrangement%29+rules+2017+pdf PDF link annotation
    • http://studiotecnicobonoli.com/userfiles/files/66013473823.pdfIn PDF document text
    • https://riolospettacoli.it/filesUploads/file/bajemukofenub.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a0c2cb02f9f---29338713748.pdfIn PDF document text
    • http://sipzip.com/userfiles/file/14935817484.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/3bbr6051u4ti5s78v0rc7a0qa4/wulujefawinofiwufepej.pdfIn PDF document text
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/90d9eff0994a2314441b9460d2878b08/gomapiwewezogusa.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/g27qig7ekuke0joulfhm8v8m9d/xukogilanal.pdfIn PDF document text
    • http://infinivideo.hu/sites/infinivideo/files/98872640790.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160cb27f59d41f---vexibebuxuladixerodekegex.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610bc51055a65---dofera.pdfIn PDF document text
    • https://kingdomdatesuae.com/userfiles/files/sijug.pdfIn PDF document text
    • http://alburigiott.it/userfiles/files/lurera.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/adb3568603d819151d9592522d4eec15/fagitulizisobiduvawofama.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be594a275a3---regobazuwisaku.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/dulox.pdfIn PDF document text
    • http://marinapogon.pl/upload/file/sarufowerifo.pdfIn PDF document text
    • http://remaining-mc.de/userfiles/file/fejimokubowalosu.pdfIn PDF document text
    • https://mujeresenmovimientoplus.com/userfiles/file/gukijuta.pdfIn PDF document text
    • http://atsrealtyvietnam.com/upload/files/98958665182.pdfIn PDF document text
    • http://ugrctrani.it/userfiles/files/5463095536.pdfIn PDF document text
    • http://avvocatoandreabruschi.it/userfiles/files/7577525980.pdfIn PDF document text
    • http://studiodabo.eu/userfiles/files/liduzi.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160a759cdba8e9---zabevowuxezexogovasip.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e18034001f---wewujax.pdfIn PDF document text
    • 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_off00010d00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D00 11604 bytes
SHA-256: 303df46d76d862722f83a9f907aa8d970eb58462fc5aa3cb7fc9ee7c34d4cabb

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