Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a97dbb426a3c1cd…

MALICIOUS

PDF

69.2 KB Created: 2021-09-27 19:33:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 5413fc4012416e22eec469ee958aad2e SHA-1: 2e0f2fd7757eb75fdf1b8c21bb26c8304de0e037 SHA-256: 0a97dbb426a3c1cd116788d62d71ce0d3967296c6d1a778f926a3bb084cc927c
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The presence of embedded JavaScript and numerous external links, many hosted on compromised or disposable domains, strongly indicates malicious intent. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this, suggesting the document is designed to lure users into clicking malicious links or executing embedded code, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5357

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://queure.ru/uplcv?utm_term=fanny+hill+pdf+espa%C3%B1ol PDF link annotation
    • http://ecohouse-lab.com/userfiles/file/xeridemukuwanoxugovep.pdfIn PDF document text
    • https://blogsma.com/files/budajinuguropupijos.pdfIn PDF document text
    • http://okna-kurska.ru/page_edit/_samples/userfiles/files/rofuvawigijokumovezazeve.pdfIn PDF document text
    • http://harekatmemuru.com/images/Media/files/zadunurefubofaxegaki.pdfIn PDF document text
    • https://ismet.com.br/ckfinder/userfiles/files/mezovozopiwugosidurenuso.pdfIn PDF document text
    • http://ort168.com/upload/ckeditor/files/31100459969.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/5fc3163b02ec6cad2bae2a1abc8a96ae/jixegodadaxibote.pdfIn PDF document text
    • http://pnmanagementsolutions.in/uploads/nopukomoruwa.pdfIn PDF document text
    • http://palestraarkadia.it/userfiles/files/9186209449.pdfIn PDF document text
    • http://rayer.cn/d/files/40574184017.pdfIn PDF document text
    • http://studioprogettoarchitettura.eu/userfiles/files/xukegupetopogiwerepo.pdfIn PDF document text
    • http://arkystudio.eu/userfiles/files/dedurudogonadaxowipig.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/16131404792942---30157950821.pdfIn PDF document text
    • https://073741256.com/uploads/files/202109020901478577.pdfIn PDF document text
    • http://occahomesearch.com/userfiles/files/77111640104.pdfIn PDF document text
    • http://beganijewellers.com/ckeditor/ckfinder/userfiles/files/60485225285.pdfIn PDF document text
    • https://stef-nancy.fr/upload/document/39819791763.pdfIn PDF document text
    • https://www.tratedu.net/ssss2018/assets/143ad273/ckfinder/core/connector/php/upload/userfiles/files/a114a9d54dddf82e206a305b19a870ee.pdfIn PDF document text
    • http://finalstage.biz/js/upload/files/27002083125.pdfIn PDF document text
    • http://fatimaartwork.com/userfiles/file/pixawuporam.pdfIn PDF document text
    • https://bodymart.in/ckfinder/userfiles/files/63045542255.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/1614c54b8886e4---24818747300.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_off0000b79c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB79C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cfae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFAE 17992 bytes
SHA-256: 61fbf78dd9b8cc8c038e863834e93496579d314789b116745b600fccc562035b
font_02_sfnt_off0000fea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA3 10696 bytes
SHA-256: 3466d15a1228afb5c7663509dc6ff2b442445ab2cb49e429767553517e791e99

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