Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ed60dc8f2bc1ef5…

MALICIOUS

PDF

84.7 KB Created: 2021-09-07 01:03:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 263efa913f408f7680d481bf18b8443f SHA-1: 4776374cf18bfa0358c5df64d4de2ce18b2c8d5a SHA-256: 7ed60dc8f2bc1ef5855763e82669237b4bcb8dfa4ef732f0c3cc3208ab81d944
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting. These links are likely intended to lure users into downloading further malware or visiting phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://ketchas.ru/uplcv?utm_term=maths+textbook+grade+12+pdf PDF link annotation
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/d8pg29f1382f219joen465vo5o/90272888311.pdfIn PDF document text
    • https://blnk.eu/userfiles/files/gawotugej.pdfIn PDF document text
    • http://copy2d.com/ftp/image/file/46640148237.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/i5t5ln3c02eftijgc4r8ps80h7/14294243677.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608319a38ba4e---372988039.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/82862024944.pdfIn PDF document text
    • http://puginternational.com/ckfinder/userfiles/files/62618707162.pdfIn PDF document text
    • http://telmeed.com/web/ckfinder/userfiles/files/56928824969.pdfIn PDF document text
    • http://clarksville.net/wysiwygfiles/file/37509054279.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160ddb1a085d66---rotug.pdfIn PDF document text
    • http://ipmarketing.net/FCKeditor/editor/filemanager/connectors/userfiles/file/tazupomijolit.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/files/nopalujapogaruroxasip.pdfIn PDF document text
    • http://cadeco.com/testingsites/advantage_aviation/assets/media/file/tevaxanonogex.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5dbded8f09---25699862018.pdfIn PDF document text
    • https://kingwrapcarspa.com/upload/files/76109751437.pdfIn PDF document text
    • http://caycanhtuyhien.com/uploads/image/files/mutipijaxowe.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131b6cc4475d---92559359864.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/82364386569.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/16091898908a7f---biler.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/poziv.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/a277356eb22c224b6a3b1b483a5627dc/xesezokap.pdfIn PDF document text
    • http://changecn.net/ckupload/files/liziwinebesipazodapes.pdfIn PDF document text
    • https://cedria.es/DOCUMENTS/FotosFCKEditor/file/rajelimiji.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/99266733534.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/e8c71f6a5028cf82ef60e6353749e741/jezozumawakejevibuxifawo.pdfIn PDF document text
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/1bb3f4d8196697689dd6a06ac4d43160/44485647425.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_off0000e5f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE06 17504 bytes
SHA-256: 0e8f020d5b25f1c35224552beac580dc40f31cb116dc46b4660ae71b1898ab63
font_02_sfnt_off00012b5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B5F 11032 bytes
SHA-256: ed9b7edc4fbefd09ea22222d07c82e94d9bf859ab81cfa23158c5b96b48eb045

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