Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ce32abbf5520f0f…

MALICIOUS

PDF

78.7 KB Created: 2021-09-15 16:46:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6fa596c5d1982ec566455087dc23b221 SHA-1: 781208b55540ed96cff8d615acaa9c884ede5679 SHA-256: 4ce32abbf5520f0fc1a93d7841ec02f7c4639ed2fd48e5790ccf59a02ae73f28
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URLs, many pointing to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing sites or download further malware. The presence of embedded JavaScript suggests an attempt to execute malicious code within the user's browser.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 7

  • 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
  • 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://allytemp.ru/uplcv?utm_term=the+happiness+trap+pdf PDF link annotation
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/akkl8u9qmm7jqa8aioitdrten5/98507231143.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/adc6960084a46ae08c1c3700ee8e7ee7/midumub.pdfIn PDF document text
    • http://sinoscaform.com/upload/ckimg/files/202109030615571011.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/eb400abc58e33be264081cbc0b3688e4/78107287521.pdfIn PDF document text
    • http://gursakaryahukuk.com/images/file/72394835537.pdfIn PDF document text
    • http://telektrans.hu/editor_up/bobidizugowimenojitopu.pdfIn PDF document text
    • http://rspon.pl/images/wyswig_images/file/8267504541.pdfIn PDF document text
    • http://cbcom.fr/ressource/site-image/files/60824679504.pdfIn PDF document text
    • http://merlegdoktor.hu/tmp/73811927975.pdfIn PDF document text
    • http://pc580.cn/upload_fck/file/2021-9-2/20210902222102487031.pdfIn PDF document text
    • http://rtm-plus.ru/ckfinder/userfiles/files/lakinewodawavumidi.pdfIn PDF document text
    • http://1yunnan.com/ckfinder/userfiles/files/73652625320.pdfIn PDF document text
    • http://www.naturhalles.fr/fckeditor/userfiles/file/31026900476.pdfIn PDF document text
    • https://xenang-mitsubishi.com/fckupload/file/wugere.pdfIn PDF document text
    • http://epoch-making.jp/js/upload/files/xosegadiwenozumotimevixe.pdfIn PDF document text
    • http://www.mueblesgamez.com/ckfinder/userfiles/files/pozaxalulanaz.pdfIn PDF document text
    • http://hoitruyengiaocodocvietnam.com/uploads/image/files/49497188354.pdfIn PDF document text
    • http://dnt-mayak.ru/content/File/41708766447.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134caa8ea0ff---julevoru.pdfIn PDF document text
    • http://kosmonautika.ee/ckfinder/userfiles/files/59026798639.pdfIn PDF document text
    • http://sweed-trans.eu/ckfinder/userfiles/files/gujumigugulidurujozovat.pdfIn PDF document text
    • http://kyanite.tv/userfiles/file/2768401301.pdfIn PDF document text
    • http://erisalaw-chicago.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/95392238922.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_off0000d063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD063 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e875.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE875 17528 bytes
SHA-256: f3d2302158a159629f831bc22ec4329e3a30b80f7b9bc4f9defc199c64086924
font_02_sfnt_off000115ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115EE 10392 bytes
SHA-256: 695afaaa2ff2153e086075ac80bc60f775a8b8fed7c82ba3964fced6c83b2267

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