Malicious PDF — malware analysis report

Static analysis result for SHA-256 09ac4e1c077af650…

MALICIOUS

PDF

80.9 KB Created: 2021-09-04 18:49:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 08c498cadba4a26c0d901d08ca087b25 SHA-1: c2866370bacfc7ac82fcfd444b6d7e2ff2468ab0 SHA-256: 09ac4e1c077af6500b1c5ffa339fd2a8b8be32e5ca675e41dae949819d3b7fcb
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://archism.ru/uplcv?utm_term=organizational+performance+literature+review+pdf PDF link annotation
    • http://inhome360.ru/admin/ckfinder/userfiles/files/vefimebilegetujumakarure.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/bagota.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16117f70e8928c---63693935503.pdfIn PDF document text
    • https://akemi.ro/hirek/file/41309349454.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/e21930dc9629318999a969271713d380/dubexorigegixiburi.pdfIn PDF document text
    • http://aliglobshop.com/userfiles/file/66234599060.pdfIn PDF document text
    • https://lamaisonducoeur.ca/upload/editor/file/velolovaletalamaboxiwomu.pdfIn PDF document text
    • http://didula.com/img/file/norekudivepuwav.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc6510f7e3---767801632.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/41a345b7e048b124f21ec66be6964814/4171092756.pdfIn PDF document text
    • https://gsm.company/ckfinder/userfiles/files/56944872569.pdfIn PDF document text
    • https://alienaquatics.com/home/gb/public_html/ckfinder/userfiles/files/wumodorimanuf.pdfIn PDF document text
    • http://skrabl.pl/www/rpbd/fck/file/wakovu.pdfIn PDF document text
    • https://indobaliart.com/sitefiles/file/rezujogebokorinetimap.pdfIn PDF document text
    • http://scuderieverdina.it/scuderia/userfiles/file/jopigofuxutuwawadu.pdfIn PDF document text
    • https://pasarantogeldua.com/contents//files/18570820224.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160cda230994f2---zijate.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/16085d73ef165f---mutezetifame.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/s1mbr0idnu8514mfharg1et6hi/98181331076.pdfIn PDF document text
    • http://itps-group.com/uploadfiles/file/9782890084.pdfIn PDF document text
    • http://letnipohar.cz/upload/file/vozadefujosokefir.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/j8mpekijs1b6516cbuss3guh3t/muzojetesatemekugotobax.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/3cf8fea28611c87c79b60aa5d7bbc6df/12493762455.pdfIn PDF document text
    • https://dusunceokulu.net/resimler/files/24292967357.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_off0000d7dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7DD 16884 bytes
SHA-256: becb251348cd7e397e73d0209fb3635276bff2a1830417f1a5ad9317013c3cf0
font_01_sfnt_off00010362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10362 11132 bytes
SHA-256: d06684a6e276528b35ad10591c51cadf34fe051e0b46da50192005d69821aa6c
font_02_sfnt_off00011d47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D47 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1