Malicious PDF — malware analysis report

Static analysis result for SHA-256 06d96dc4b47f54c6…

MALICIOUS

PDF

99.1 KB Created: 2021-07-08 22:25:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 17c97e7c0f304630b1b328edeb505fee SHA-1: 396834d2c0e15797d6eff32d201c18da8f7d9e34 SHA-256: 06d96dc4b47f54c676f57b4e74116bf06ed13fe20f134297de48dff99c09d017
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to compromised websites and disposable hosting, suggesting it functions as a link farm to distribute phishing content or further malware. The PDF structure and embedded URLs are consistent with a phishing lure, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://pistant.ru/uplcv?utm_term=how+to+see+if+your+on+someone%27s+private+story PDF link annotation
    • https://akproauto.com/nbloom/fckuploads/file/35811825120.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce8469c811---masijoxep.pdfIn PDF document text
    • http://raczcsalad.hu/files/95750308156.pdfIn PDF document text
    • https://nguyenthelong.net/userfiles/files/3472222264.pdfIn PDF document text
    • http://amdind.com/userfiles/file/18425468775.pdfIn PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/e8c3d4d74506a541857409caca45d806/duroxuzakisasawoto.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/d296b94a2055a131e5d5297f75166471/gajupipoba.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/3d8698e7f16a9d2d491f79a0b4d4bcac/69132613217.pdfIn PDF document text
    • https://bahia-group.com/ckfinder/userfiles/files/31456668090.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file///9853777144.pdfIn PDF document text
    • http://aitrans.cn/UploadFile/file/F1202106060354217780.pdfIn PDF document text
    • http://aliglobshop.com/userfiles/file/87605581819.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/2d903b1605e1aeb2f2f533d033ed67af/62625224452.pdfIn PDF document text
    • http://ucity68.com/clients/e/ea/ea220da86df44fb0ae3b7c8e8295ccc1/File/jisefowasunowewujesizu.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e6cd26704---gedinabefajotoguzalu.pdfIn PDF document text
    • http://soupworld.de/upload/file/4164209468.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/78374b44127656634a8efeaf3518f5b6/31074871904.pdfIn PDF document text
    • http://aircond.md/upload_fck/file/wopunumegizexafub.pdfIn PDF document text
    • http://blackivy.pl/userfiles/file/8397484448.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/33952602720.pdfIn PDF document text
    • http://americanpetrochemicals.com/customers/CMS-IMAGES/file/noveviratefim.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c25bc5d6521---zupaziwep.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/5d35037748de988541ca38c1abbdf3d3/wugowomozune.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608dc06f09b01---15773984375.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3a147e7dbd---98344180536.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011f37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F37 10864 bytes
SHA-256: 90a2fc628ca0c4a15f5f08af18bc925f4424b04297acaa27f55c2095b4b8ee7b
font_01_sfnt_off00013875.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13875 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15087 17640 bytes
SHA-256: a2fa42f7e6b2c261d40283b6da861e21f117d48c6c6fca5851cab2b8a1b7cc0c

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