Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e1953106117b31f…

MALICIOUS

PDF

98.9 KB Created: 2021-08-16 02:35:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 4459e634145ac4c570ed2d0cc53b8089 SHA-1: fbf5626ce8ab718cf2b70822658c43ee4497d7d0 SHA-256: 7e1953106117b31f0fc302c79519de6df54af7e57f69d8262e66badba87e528c
172 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URLs, many hosted on compromised CMS upload directories, suggesting an attempt to download and execute a secondary payload. The heuristic 'SE_INVOICE_LURE' indicates the document's content is designed to trick the user into taking an action, likely related to payment or an invoice. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 8

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=rapprochement+bancaire+ohada+pdf PDF link annotation
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/11a4aac42a8e3764b70005af03aa802b/pexozesizonofowumakinewe.pdfIn PDF document text
    • http://eschool365.in/js/admin/uploadfiles/file/12082347069.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab99c348e8c---falenatevijisipinamawixi.pdfIn PDF document text
    • http://winteringlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/85138624624.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/4b3540fc69b21e88e57b26c4ddd6d4b3/47921336556.pdfIn PDF document text
    • http://teechart.com/uploads/images/files/lupidonazefaz.pdfIn PDF document text
    • https://diedacorporation.net/freesiafiles/file/34921970467.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc4e932945---42240652278.pdfIn PDF document text
    • http://daiichilogistics.com/uploads/news_file/20864840891.pdfIn PDF document text
    • http://marketypik.pl/zdjecia/fck/file/84275389362.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/53245797200.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080c7b6a6e53---kinurulawenejutavulozewil.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160bf525e84035---gekodujoxuli.pdfIn PDF document text
    • https://kingyao.com/uploadfiles/files/20210805_111910_4705.pdfIn PDF document text
    • http://insightonafrica.in/userfiles/file/72771921178.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/29217886143.pdfIn PDF document text
    • http://kiuruvedenlukio.fi/tiedostot/file/mabadifum.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080ec24eddb4---zududinalitebi.pdfIn PDF document text
    • https://stillwaiting.org/userfiles/file/65434382321.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/jozebesutazavigufinimunov.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcd5761d6b8---vigag.pdfIn PDF document text
    • http://caudafotografia.com/userfiles/files/36438224268.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/1c1qgqm9q1arc6opk3b03v6l74/pisorimutukalib.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091aafb8c26c---78097194338.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_off0001197f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1197F 19484 bytes
SHA-256: f0da223d57886da0178dc9bc0fdd35abe7711bf58db585855912755ceb2cce36
font_01_sfnt_off00014a6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A6A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16281 10856 bytes
SHA-256: a5c23d6f372ad0ac2dfbb37bee451df50a1d60df2c8af3ac837da5ee0ea2e87e