Malicious PDF — malware analysis report

Static analysis result for SHA-256 b14bde58fbdb17ee…

MALICIOUS

PDF

67.8 KB Created: 2021-09-17 02:00:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d9bf6f6c76d752c0b81735d56b0cb7fb SHA-1: df1fdff3d8adea99f0da9a6a298311d6a2b9f278 SHA-256: b14bde58fbdb17ee10443143de490f81389a809b41be174ad3fe3ccea1c4df9d
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as a malicious PDF by ClamAV and an ML classifier. It contains embedded JavaScript and numerous external URIs, including links to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution attempt. The embedded JavaScript likely facilitates the redirection or execution of further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9108

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://philabc.ru/uplcv?utm_term=pro+tuber+apk PDF link annotation
    • http://bloomx.com/sites/all/sites/bloomx.com/files/49329504030.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/23e091d2f8cff3334d1315d36949f648/sogetesedalasobavedozomu.pdfIn PDF document text
    • http://as-eng.biz/userfiles/file/22997746541.pdfIn PDF document text
    • https://lexcochoralsoc.org/demo/lccs/beta/userfiles/files/16356566088.pdfIn PDF document text
    • https://aneri12.eu/res/file/baxivafavo.pdfIn PDF document text
    • http://test-immo.com/file/74597980347.pdfIn PDF document text
    • https://pasarangroup2.com/contents/files/zusigoxupejoze.pdfIn PDF document text
    • http://galluccifaibano.it/userfiles/file/fonexapuni.pdfIn PDF document text
    • http://copy2d.com/ftp/image/file/42060880356.pdfIn PDF document text
    • http://hoilhpnqbthanh.com/upload/file/9582015510.pdfIn PDF document text
    • http://architettomontanino.eu/userfiles/files/29727165055.pdfIn PDF document text
    • http://fobosgrunt.ru/files/ckfinder/files/531054981.pdfIn PDF document text
    • http://jawarakreasi.com/file/demidalesukokiruvirepis.pdfIn PDF document text
    • http://autoset66.ru/admin/ckfinder/userfiles/files/55192199549.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/161334c1319845---kaputusatatomineguvaj.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/04ca5d76a9b01a71cf62bfc5309143fc/27238514031.pdfIn PDF document text
    • https://himalmanpower.com/ckfinder/userfiles/files/lubadasiledikapum.pdfIn PDF document text
    • http://pilot-market.ru/new/files/file/54502876025.pdfIn PDF document text
    • http://ncteonline.com/userfiles/file/16213527741.pdfIn PDF document text
    • http://villaelen.it/userfiles/files/xapewixag.pdfIn PDF document text
    • http://merlegdoktor.hu/tmp/84081076051.pdfIn PDF document text
    • http://obras.ru/sites/default/files/uploads/bigawomimu.pdfIn PDF document text
    • http://inphuduong.vn/upload/files/kitugogibideraligixubo.pdfIn PDF document text
    • https://www.travelknowhowscotland.co.uk/assets/js/ckfinder/userfiles/files/16784965162.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD750 18008 bytes
SHA-256: c15c3458f636ee1a2c368471e6e14b0c3ff2f12ce242cc5dbb8ad01ac2f2e64d

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