Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e4fbe600ebbb912…

MALICIOUS

PDF

81.8 KB Created: 2021-09-02 05:47:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 80aba10cc73ed550ac4fd0f7c9948eb0 SHA-1: b094a241a68879a798676b1df35e50fe51f1598a SHA-256: 0e4fbe600ebbb912e84b8cdf61a3c5dc5d329a26a59df4c051df42150924e256
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document containing embedded JavaScript, which is a common technique for executing malicious code. The PDF also functions as a link farm, directing users to various external URLs hosted on potentially compromised or disposable domains. These URLs likely serve as landing pages for phishing attempts or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://pixomot.ru/uplcv?utm_term=harry+hill+quote PDF link annotation
    • https://1877painters.com/FCKeditor/file/52036756409.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/4ff0b5e09bb598113b939c6ca028aa26/vejisefafakiluvunufe.pdfIn PDF document text
    • https://unicorn.mn/js/ckfinder/userfiles/files/duxunufok.pdfIn PDF document text
    • http://duszek-lasu.pl/userfiles/file/6687419629.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/fozumumefifotepulilexame.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/d9480d2bb56823f09b4e81df45d7c58d/37163869624.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/3a6ec0e680d09e306ea2244d4768a3a2/98525366905.pdfIn PDF document text
    • http://mamtomchabahai.com/uploads/files/files/85299556909.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/4e431a0f9b684c83aa695b420c2b9df1/jewifuxu.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/sgq1ph7e355d3upiul1658jcg6/83818854672.pdfIn PDF document text
    • http://melly-incendie.fr/img_db/83212364440.pdfIn PDF document text
    • http://plncse.hu/php_data/file/gukupatupoposinedagile.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b2b19ccd238---18160647329.pdfIn PDF document text
    • https://btegypt.com/file/66989583624.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16092c92870cc1---12599563314.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a03a070e916---ruwuwaribavumetozawiw.pdfIn PDF document text
    • http://www.darvidproperty.com/news/file/57793161455.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c20519d7e07---28061082712.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/21b9c467352b90b37efddcf8498beec3/subikoxaliliginugop.pdfIn PDF document text
    • https://insolite.lu/img/userfiles/files/79486165613.pdfIn PDF document text
    • https://airshow-bg.com/file/88199306522.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be5ed55b521---suwizoferibijisekamuni.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/f77023f91abb48a9cee90f5cdfc6681b/31616784436.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_off0000d7f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F0 10284 bytes
SHA-256: 811b792a6e2d68a23a23886dfbe137098b0fd7dff7d00ea466f8a98ed1dafde7
font_01_sfnt_off0000ef30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF30 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10742 19584 bytes
SHA-256: 609b4e34524919b3898b181b9ec7941306e748424370b0a4721ecc3ec30acabe

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