Malicious PDF — malware analysis report

Static analysis result for SHA-256 6766ad5c98846ec0…

MALICIOUS

PDF

74.5 KB Created: 2021-09-02 10:54:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: c9c07bad28e7a819a73542e5c5755a4f SHA-1: 38259c3b0b146352c02834df7cdf6a64fb0b3ce7 SHA-256: 6766ad5c98846ec05362800a4f8384936932cfcaaa8124cf968f3764b5c4db16
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users to potentially malicious content. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pixomot.ru/uplcv?utm_term=mike+tyson+punch+out+emulator+online PDF link annotation
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/908a25b3fd0365f80c94a6caf9dac765/90563611080.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/3ddc80732ed92c9256e6457f2738a48c/5949104582.pdfIn PDF document text
    • http://krcatikyonetimi.com/userfiles/file/rikosarame.pdfIn PDF document text
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/a3958c027ce9ce4e6f806d6c28803e86/fuvisuwulesexepejetojogi.pdfIn PDF document text
    • https://www.travelknowhowscotland.co.uk/assets/js/ckfinder/userfiles/files/dimuruwunosadarogaxuviz.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/goxenirikozip.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1b3460bf6---62106976755.pdfIn PDF document text
    • http://www.guus.edu.mn/ckfinder/userfiles/files/pamajibeximi.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee31b215cc---gawogumed.pdfIn PDF document text
    • https://hizlipin.com/calisma2/files/uploads/5359561954.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160def68a1359a---zidete.pdfIn PDF document text
    • https://medbillings.us/lightspeedweb1/file/58896462771.pdfIn PDF document text
    • http://abwingsva.com/uploads/files/xawifekakepuxufokugejazix.pdfIn PDF document text
    • http://hmed.vn/upload/files/rurilag.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb2681dde7---76206444470.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/c3202cc63a759cfd14302022802340a5/kigasulowasomeg.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/vdl8t8efijavct9n8aim8mngko/22535399521.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/og8lff1tloloimvcmub827ljto/13227852191.pdfIn PDF document text
    • https://www.q-jin.ne.jp/ckfinder/userfiles/files/jepekuwejoka.pdfIn PDF document text
    • http://orosweb.hu/ckfinder/userfiles/files/jijisu.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16124deeead213---vibilisasosiziduxi.pdfIn PDF document text
    • http://coral-travel66.ru/admin/ckfinder/userfiles/files/zipagapu.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_off0000bfe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFE2 16828 bytes
SHA-256: 70799488a16e404d3d62a0d50373f43028edd19357bac313f4a90d9b205e7d88
font_01_sfnt_off0000ea95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA95 10936 bytes
SHA-256: 76f69e9a0eb079416733511093a63b12e83fbd688371b1a162b8dc81dec96bf4
font_02_sfnt_off000103c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.