Malicious PDF — malware analysis report

Static analysis result for SHA-256 d76bde2efc919e55…

MALICIOUS

PDF

96.3 KB Created: 2021-07-07 00:31:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 30cf9a87e3be112b2cf297c13abfd948 SHA-1: 27a8b640f7d7d6786e91e236b9e325de1ecfe70f SHA-256: d76bde2efc919e55f1e64d7b00f2f4bc9156a0830abc0f7f8248580db1be24c5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains a link farm hosted on compromised WordPress upload storage, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were extracted, the structure and URL patterns are consistent with malicious PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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 https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/93gqfbl6lg1ctnr2ec1jmugdbg/55861286603.pdf
    • http://nuestratierrapremios.com/campannas/file/26373951803.pdf
    • http://albino-pitti.com/pub_img/file/51865201037.pdf
    • http://simmsfamilyreunion.com/clients/9/98/98d47f1658d09d39d77ba56043454c9c/File/vomevudorosadif.pdf
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba5937a480---zewitisefidagipi.pdf
    • http://arci-mp.fr/admin/File/28370126245.pdf
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/tk3f4k3r1tcekm5livj7cujtb8/90218765027.pdf
    • http://kapelski.pl/userfiles/file/93348275016.pdf
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/309f4c169ef9864b75eba21502182d4d/kidafijudokog.pdf
    • http://michaelwilliamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/poruxawekawinireteluze.pdf
    • http://kingnature.ru/files/files/mejasapamarosa.pdf
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1609daf90aaad1---81652575730.pdf
    • http://tinnaduraflex.com/uploads/files/pesovegugagoxinu.pdf
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/ac04186c1372c6ae32ad8246f8285436/xedujetogavuxedubowunasin.pdf
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3dea150d55---91799536133.pdf
    • http://brilspa.ro/userfiles/file///85131196052.pdf
    • http://chothuexehochiminh.com/userfiles/file/84888685636.pdf
    • https://strategieb2b.com/userfiles/file/nanofavuxemi.pdf
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d773782fa6---93210905612.pdf
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16078148f27b0d---29588842530.pdf
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0d1955fcf---55862755008.pdf
    • http://kingsfinancialconsulting.com/userfiles/file/84989183609.pdf
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d4e9ccd09ee---wukek.pdf
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/odvi0rjau13313oft2t4hgkt56/bipenolaxipugak.pdf
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/695655aad51ffb3ad9bd838cf0329398/siwivagetepivugobaziba.pdf
    • http://www.sec-ollivier-associes.fr/www/upload/file/85292937546.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=200+rogers+american+dad
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000113c6.bin
7b1a6a19fb57830b182330c08511b8a16cb04b6342ac54e1bb94b55bad7a9454
pdf-font-stream PDF embedded font (sfnt) at offset 0x113C6 18504 bytes
font_01_sfnt_off00014364.bin
4417822c823f2d4b20875f08115fcf189d851bf2a4f91e9e8ce7296204fc0f43
pdf-font-stream PDF embedded font (sfnt) at offset 0x14364 10712 bytes
font_02_sfnt_off00015bc8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15BC8 16792 bytes