Malicious PDF — malware analysis report

Static analysis result for SHA-256 6698f36002ac8859…

MALICIOUS

PDF

88.8 KB Created: 2021-08-08 09:44:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 8999e22b850dd31d5ca8804a430e3a1b SHA-1: 0202fda393cf4fbb72f95fab8898cfd04ad16bd1 SHA-256: 6698f36002ac8859085b70c639a4a60d1871f29dfeaf33a393bba643bccbfffd
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript and a large number of external links, many pointing to compromised websites. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a phishing or malware distribution intent. The embedded JavaScript likely facilitates the redirection to malicious sites or the execution of further malicious code.

Machine Learning

  • Nyx PDF Classifier clean score 0.1831

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pistant.ru/uplcv?utm_term=characteristics+of+bacteria+worksheet PDF link annotation
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f6ab4d4499a.pdfIn PDF document text
    • http://lafenicealcamo.it/userfiles/files/35787936125.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/900468bd2cdcec05861cf7f20a696445/vawutep.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/6lgg6ru64dnid3dn8pmrpuicer/wulimimimitasiliwewevev.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4ecc53e98---49188013894.pdfIn PDF document text
    • http://pitin-akutsu.com/js/upload/files/86725639309.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202106291212328224.pdfIn PDF document text
    • https://lose-weight.tw/upload/files/30062970164.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bbea61892d6---rekerifojexolosurosotasi.pdfIn PDF document text
    • https://zevkotodoseme.com/upload/ckfinder/files/88393974403.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e26a8c7a238---tavagopiximexo.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c8d440988---37809706450.pdfIn PDF document text
    • https://sindonis.com/userfiles/file/99648226028.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/7151b666c4ff8125b6796358f5287ad8/pivivugalu.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/b2355a5dca67b5299a3bd4bc3ea79a64/xudavugofirawa.pdfIn PDF document text
    • https://corghialberti.it/file/58460842214.pdfIn PDF document text
    • http://ylgems.com/file_media/file_image/file/26734497133.pdfIn PDF document text
    • http://topenglish.sk/app/webroot/gallery/files/80393924738.pdfIn PDF document text
    • https://aymfly.com/aym_image/files/viselefitarok.pdfIn PDF document text
    • https://limsurdua.com/contents//files/44245279892.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/ed8199672776a597e805bdc74d0e2d0c/wibawapiwijamo.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beea6ed80c6---kafekoxa.pdfIn PDF document text
    • http://sola-brothers.com/userfiles/file/liwijodi.pdfIn PDF document text
    • https://lecormier-menuiserie.com/www/upload/files/2519713902.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/be1c152f27a2fb65b110ebdce5b274d1/98748592686.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/dpk724ctkeumac9m4nts07ipti/xemedejudopapexedisit.pdfIn 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_off00010a02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A02 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12214 17000 bytes
SHA-256: bcc5bde3212a75cd969ec3290772359aa0039d43bb161bf418c0999b20013e5e
font_02_sfnt_off00014e54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E54 10632 bytes
SHA-256: 656c35423a9bc0d80066c7b2aaf0806e880ae532e1d6d01b17fb6ef80e68be91

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