Malicious PDF — malware analysis report

Static analysis result for SHA-256 e94f3172d28290fa…

MALICIOUS

PDF

82.3 KB Created: 2021-09-09 09:05:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 60ea04215e2e138c9fcc0380e313e45c SHA-1: 4223a07e693e2dc7764ef5eb7da852fd3ddff458 SHA-256: e94f3172d28290fa33f0caf31d6c05280618f40832cc9182f26053dc8fa1d7be
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple URLs, many of which are hosted on compromised or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://sriagasthiyarastro.com/FCKeditor/userfiles/file/vasexavepobomoso.pdf In PDF document text
    • https://landbar.com/app/webroot/js/ckfinder/core/connector/upload/files/nusubu.pdfIn PDF document text
    • http://lammermoor.net/imagenes/file/85286485415.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613657199b8a7---76470077213.pdfIn PDF document text
    • https://tsolisp.com/files/file/fegavi.pdfIn PDF document text
    • http://exteractif.fr/pictures/2/86537300147.pdfIn PDF document text
    • http://colokit.thienlonggroup.com/Images_upload/files/duxuxavumeb.pdfIn PDF document text
    • https://familienbilstrup.dk/userfiles/file/44340435219.pdfIn PDF document text
    • http://abarappresentanze.it/userfiles/files/juzugelavusonazox.pdfIn PDF document text
    • https://themalc.org/files/file/67050690142.pdfIn PDF document text
    • https://zapcdn.space/web/img/podborky/files/notigififuzaseg.pdfIn PDF document text
    • http://www.sm.ac.th/ckfinder/userfiles/files/38836936248.pdfIn PDF document text
    • http://hycxchina.com/filespath/files/20210908041057.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/oad92p4khhh5nreshiefekopjl/gilixeguxuladum.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/d71532e4c844fec3d777e903c0b843ed/76366960284.pdfIn PDF document text
    • https://arabadvertise.com/userfiles/files/4100391950.pdfIn PDF document text
    • http://www.naturhalles.fr/fckeditor/userfiles/file/wexotimavukezowajixolew.pdfIn PDF document text
    • https://kingdom.vn/userfiles/file/kiwisozejiso.pdfIn PDF document text
    • http://burchiellati.com/file_fck/file/90353439034.pdfIn PDF document text
    • http://expresskaliski.info/file/zipaji.pdfIn PDF document text
    • http://dentalclinicbangalore.com/uploads/ponakitimiweposi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=ero+condo+game+downloadPDF link annotation
    • 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_off0000dbf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF0 10424 bytes
SHA-256: f3b2d5d63d999d9f309595fc857031dd933981c2ac2c008201d8b255218d7d27
font_01_sfnt_off0000f35a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF35A 18508 bytes
SHA-256: 610872d0fe519c60d1f25b4e426415b5552cc2208c4d123cd08002c824b4abfb
font_02_sfnt_off0001239d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1239D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1