Malicious PDF — malware analysis report

Static analysis result for SHA-256 c036ee547f706e68…

MALICIOUS

PDF

85.1 KB Created: 2021-09-08 15:05:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b3e26c632955897d3b6bf24c88ab3ce1 SHA-1: 1ff93abe651f165401a5e146c2084ded6104442e SHA-256: c036ee547f706e68612fe4612899a170f3d0c615a85bdd6c2843acc18b3d4fdb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and link farms pointing to compromised WordPress upload directories, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lead users to malicious content or further compromise. No scripts were extracted, but the structure and URLs are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • 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.
  • 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://drafthe.ru/uplcv?utm_term=proform+xp+crosswalk+580+treadmill+manual PDF link annotation
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/kt4dfbh28d1n3qnlio622rqse1/pebuzejizubenos.pdfIn PDF document text
    • http://medicare-darmstadt.de/bilder/UserImages/file/33623187886.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/ghvvvqlqvijs4ovd2ivndb9f1j/kidobupazevobex.pdfIn PDF document text
    • https://chambres-hotes-aube-bleue.fr/userfiles/file/foxof.pdfIn PDF document text
    • http://gabinetortodontyczny.eu/userfiles/file/55278514905.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/6it9eujephqjcla30ncr0l5il7/48489524024.pdfIn PDF document text
    • http://www.bluefashion.cz/ckfinder/userfiles/files/54488288669.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/9adf4ba602d7de1d30665fca198beda6/diwemumesepov.pdfIn PDF document text
    • https://alutat.com/data/file/2383924319.pdfIn PDF document text
    • https://blugarden.eu/file/31922264028.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138a2df9de35---jefeparokiludasekeg.pdfIn PDF document text
    • https://trompis-tondschungel.de/userfiles/file/wipidadijiziz.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612ebb9fca394---96575598972.pdfIn PDF document text
    • http://tbff-bygg.se/img/files/21272569823.pdfIn PDF document text
    • http://ychnjl.net/userfiles/files/46481199248.pdfIn PDF document text
    • http://scpt.it/userfiles/files/98209077085.pdfIn PDF document text
    • http://kamienneogrody.com/userfiles/file/74239388397.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/e54c0a1f2eadea5d9e2377bc4e9af68a/9397091155.pdfIn PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/56460896484.pdfIn PDF document text
    • http://cold.lt/userfiles/file/26670329064.pdfIn PDF document text
    • http://www.groupementpecheduloir.com/ckfinder/userfiles/files/soziginalejaxaxanomokebil.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_off0000e3ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3EF 18092 bytes
SHA-256: 57dee082bcd967d5fb3a4b67ea9fc8b856638ef23b2a69f1209cbab2312579db
font_01_sfnt_off00011314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11314 11628 bytes
SHA-256: 03b45895454c3980080ac2647f0a463b48ac1c6fd46c38fc28a12e9faef55cc0
font_02_sfnt_off00012ed7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ED7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1