Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a0f732d3d304ae9…

MALICIOUS

PDF

87.3 KB Created: 2021-07-01 18:19:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: e725ac1cab0efa81083ff0ccf51e19cf SHA-1: af849a980c3638ff9f0dd61fb92170d0dcf1fb8a SHA-256: 2a0f732d3d304ae9e3ce80c9c7568249a5b9d514895719d4d3b935ce5cd9ece4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous URLs, many pointing to compromised CMS upload directories, indicates a link farm designed to lure users to external sites. While no scripts were explicitly extracted, the PDF structure and link farm suggest a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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.
  • 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://paroissedementon.fr/upload/files/wapebuxasagewe.pdf In PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/58d6130baf21da8345ad67d5bd8533fd/jazibivetalesuwulup.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/4b66207a90e0186ad7f9b4c71141de06/34884820988.pdfIn PDF document text
    • http://www.doctor-carpet.com/wp-content/plugins/super-forms/uploads/php/files/egfrsc050ustl20tr8uc5cq755/99954963403.pdfIn PDF document text
    • http://mywayrtk.info/userfiles/file/6497314476.pdfIn PDF document text
    • https://actor-conseil.com/files/file/65624229350.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bacee55d43b---21567069120.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/fd5c5c2e68ad45cc1f61461271e4db9c/madimasapixuniwigu.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/b18985924c03c557560bf6c7031bb6ea/88686445733.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/27249635272.pdfIn PDF document text
    • http://blueyee.com/upload/file/120849211838.pdfIn PDF document text
    • https://fairtradeportal.pl/userfiles/file/5556979226.pdfIn PDF document text
    • http://mid-europe-ex.com/images/blog//file/84478521985.pdfIn PDF document text
    • https://coimbatorepressclub.com/FCKeditor/userfiles/file/53586318183.pdfIn PDF document text
    • https://aviatroglo.fr/IMG/file/vulosapigogututa.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b00983dd0d6---zanevatalelumalov.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd7716cff08---2818289979.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac9241d407---60318383872.pdfIn PDF document text
    • https://observatoire-omic.org/documents/file/22712056564.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/b958295777fc8eca5a896587d318ce3a/34981438728.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ab80fb41c53---gujebukumixo.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/0acc9d60bac2ba002b32350d94de147a/2740843682.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/tozotimogotirit.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=organic+dry+cleanersPDF 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_off0000f2b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B8 17460 bytes
SHA-256: 502d145ca01c38974017b0ef0f4cd8f2c269dd8dbf8a06c57251362b671de19a
font_01_sfnt_off00012027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12027 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001383e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1383E 10468 bytes
SHA-256: 2f4c3a08e7c16e57f9f55b8dc7c85588a184b672baed8bfffab6d3c3bf270501

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