Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9c068f910e9aca0…

MALICIOUS

PDF

88.1 KB Created: 2021-08-05 13:30:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 560ce061f61b30a9efa7e3547dc9fad1 SHA-1: eb1cd16e2672c60daa9d5c0991f70e615292b21c SHA-256: f9c068f910e9aca0eccda6f8348beb75011e104dbfc2f619459d2017913ea1b7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by a machine learning classifier and ClamAV as malicious. It functions as a link farm, containing numerous URLs that point to external websites. Several of these URLs are hosted on compromised WordPress sites, indicating a potential distribution point for malicious content or phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://xnucleus.com/members//member_images/files/9996912275.pdf In PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9e36937bea---bonikogamalogon.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/6811a1593f72c4d9dca5804318cfd8cb/levomanetinijevumep.pdfIn PDF document text
    • https://tims.ro/ckfinder/userfiles/files/5381894931.pdfIn PDF document text
    • https://next-engineering.com/userfiles/files/15944563876.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/99ed2a6d1e9e51b8ada5322a3401b7ec/fikenukusozoguvabazu.pdfIn PDF document text
    • http://joltiy.ru/uploads/files/durejobivamij.pdfIn PDF document text
    • https://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/dc5b06f04002b48752b8dbdbcabb3f81/66694465033.pdfIn PDF document text
    • https://kingdomdatesuae.com/userfiles/files/xemisobubudowam.pdfIn PDF document text
    • https://agroadvanced.com/app/webroot/newsletters/editor/files/1980599568.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/zipifomomosovebif.pdfIn PDF document text
    • http://brkvinc.com/userfiles/file/voriw.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/960eea1a66d6cc8c784196082163b62d/55564692236.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e5cb6a4949---metosepela.pdfIn PDF document text
    • http://detaycopymatbaa.com/userfiles/file/51486306010.pdfIn PDF document text
    • http://joewhitefamilysite.com/clients/59967/File/10866083301.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086d20603bef---90491359276.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa1de873ce---fimemozonudetupiguvupigoj.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160829102475c2---7343446306.pdfIn PDF document text
    • https://maclashoes.it/file/gurefokitesumubusimal.pdfIn PDF document text
    • http://giasuthienphuc.com/Images_upload/files/voworabufalix.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/cfc567d5969f86a1ec4bb67bb57c6f12/juwemuv.pdfIn PDF document text
    • http://josephpowellfamilyreunion.com/clients/0/04/04c15d356d3082020e114f8c0300f46e/File/69656590105.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/69132439139.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/4ak78dt7ch6f6rf05qcsh60o9j/3332277916.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=the+kissing+booth+2+cast+rachelPDF 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_off0000f431.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF431 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010c48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C48 10824 bytes
SHA-256: 41c8ae09391b43ccc5a25c904d3d9cb90b375ea4e914b8331713651e2a6c062c
font_02_sfnt_off00012549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12549 17408 bytes
SHA-256: abe2004021a6ba54fcd484095d96c907e1f53e93a0ef0ea3719ffd9dafa27155