Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6d1a059c917b4b6…

MALICIOUS

PDF

78.1 KB Created: 2021-09-18 00:37:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: eceda46112c52894ff70fe9100896294 SHA-1: f37adb1ea93d0eacc807e9f2e0679bbcb2e3392e SHA-256: d6d1a059c917b4b67a299162cd295236cc6a9d99f0ff67154778c013c2b841b6
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is often used to redirect users to malicious websites or download further payloads. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of numerous external URIs suggest an attempt to distribute malicious content or conduct phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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
  • 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://huntic.ru/uplcv?utm_term=league+of+legends+android+system+requirements PDF link annotation
    • http://nasledie-sluck.by/var/upload/file/99627281171.pdfIn PDF document text
    • http://hasdeu.md/data/userfiles/files/vewexomuribagutepaxibudem.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b2a37be21f---vuwitif.pdfIn PDF document text
    • http://acrclubinversores.com/files/galeria/files/57475127641.pdfIn PDF document text
    • http://hotelbasantresidency.com/uploads/80831117993.pdfIn PDF document text
    • https://www.auto-ecole-acm.com/ckfinder/userfiles/files/girixudane.pdfIn PDF document text
    • https://dacola.com/upload/files/69949774320.pdfIn PDF document text
    • http://hadt.vn/upload/files/68613391339.pdfIn PDF document text
    • http://vinhhangvien.com/upload/files/gisatoxo.pdfIn PDF document text
    • http://okfilm.kr/userData/board/file/xutuwerekuvasu.pdfIn PDF document text
    • http://hasyo.net/files/file/fafibudiza.pdfIn PDF document text
    • https://eguiders.com/uploads/tukomarel.pdfIn PDF document text
    • http://paulgraphics.paulsfashion.in/files/sujeluliwu.pdfIn PDF document text
    • https://konteshamamotu.com/userfiles/file/tipoviwifu.pdfIn PDF document text
    • https://inks.bg/userfiles/file/surewugi.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a8ffc88078---21945225547.pdfIn PDF document text
    • http://istanbulballoons.com/ckfinder/userfiles/files/60690049818.pdfIn PDF document text
    • http://sun-marche.com/app/webroot/js/ckfinder/userfiles/files/winegijarijize.pdfIn PDF document text
    • http://ipcmanpower.com/admin/style/images/userfiles/file/75623146047.pdfIn PDF document text
    • https://rajnnuhiddje.se/userfiles/file/32391074494.pdfIn PDF document text
    • https://mandarinusa.com/userfiles/file/1631365572.pdfIn PDF document text
    • http://hyunbulsa.org/~ewedd2/userfiles/file/8461262726.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB731 11012 bytes
SHA-256: 3a7f8ff336660b46eb3187b21da3c066ca354de80341e55ca98c7d8828e72985
font_01_sfnt_off0000d043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD043 16424 bytes
SHA-256: ef8701eb79685041ba51b48b3ed5be6a2743d899f5b89193a8f0275675b44e26
font_02_sfnt_off0000e6fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FD 16796 bytes
SHA-256: 6b312d9d71c309c192cad206cdeb98385985d4de8e16ea4f1bbc30f3b2d1e1b3
font_03_sfnt_off00011225.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11225 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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