Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0d593a019175e1f…

MALICIOUS

PDF

84.9 KB Created: 2021-09-10 16:57:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d6e27efb2248215b58ca6212509fd22c SHA-1: 086c53fa3fbbdda6c0b2c76f1458cfc0f88cd09e SHA-256: a0d593a019175e1f129df4f39018afe84aa12ae0902ef56fde2ab1504343687f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to various domains, suggesting a link farm or phishing campaign designed to redirect users to potentially harmful websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags the PDF for containing many links on disposable hosting, reinforcing the phishing or malware distribution motive.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 5

  • 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.
  • 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://crysiq.ru/uplcv?utm_term=mod+apk+for+hay+day PDF link annotation
    • http://sistarelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/voditekewosutuzoli.pdfIn PDF document text
    • http://canadanur.com/resimler/files/19945876586.pdfIn PDF document text
    • http://ziva-muzika.cz/files/file/17902966714.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16137ab959152d---wuduxebiwevodukodefekase.pdfIn PDF document text
    • https://yuvasarkar.org/userfiles/file/pinezusor.pdfIn PDF document text
    • http://marta-galan.com/files/varios/file/nokigapopumimux.pdfIn PDF document text
    • https://ita.kru.ac.th/ckfinder/userfiles/files/25145958350.pdfIn PDF document text
    • https://foulardfotografando.it/file/62619892375.pdfIn PDF document text
    • https://nuttydog.hu/ckfinder/userfiles/files/tusedoz.pdfIn PDF document text
    • http://lynxitservices.com/ckfinder/userfiles/files/98817072728.pdfIn PDF document text
    • http://15449010.com/FileData/ckfinder/files/20210910_2D139EDB1C32263E.pdfIn PDF document text
    • https://pr-dienst.ch/file/romipepulode.pdfIn PDF document text
    • http://theartofdesign.nl/ckfinder/userfiles/files/23021096067.pdfIn PDF document text
    • http://2017.letnifestiwal.pl/ckfinder/userfiles/files/modarumonobofisujude.pdfIn PDF document text
    • https://madhubanindiancuisine.com/nbloom/fckuploads/file/dirawaxunukubekupifidud.pdfIn PDF document text
    • https://lesartsdansmonjardin.com/userfiles/file/20210907192709.pdfIn PDF document text
    • https://perfecthospital.org/ckfinder/userfiles/files/zevusuz.pdfIn PDF document text
    • https://tomorrowhubs.com/upload/users/files/6981464203.pdfIn PDF document text
    • http://pilot-market.ru/new/files/file/38764196527.pdfIn PDF document text
    • http://gojjang.com/uploads/files/88098889714.pdfIn PDF document text
    • http://www.vishalsahni.com/public/ckfinder/userfiles/files/88874170904.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16134cee74c81f---59461535076.pdfIn PDF document text
    • https://ural-aiti.ru/admin/ckfinder/userfiles/files/wuveguxulogete.pdfIn PDF document text
    • https://manage4.realtourvision.com/rtv/ckfinder/userfiles/images/files/75727456011.pdfIn PDF document text
    • http://escuelasfutbol8.com/docs/files/sitafiregevatajezetava.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c04a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC04A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d85c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD85C 22376 bytes
SHA-256: 287f7b30943e4dd77e03f51832336fc8015f32241a2863d6eefbbcdc60e41369
font_02_sfnt_off00011019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11019 16244 bytes
SHA-256: fddcbe21bdf9fb2753729b4ab5b26d7a3fbb01e3fe51d41ab0725360e25c189d
font_03_sfnt_off00012608.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12608 10156 bytes
SHA-256: 81116f758acfc5464e7950e890f8fd3632f98b607d8bd9e95620b7d8bc181b12
font_04_sfnt_off00013cce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CCE 1680 bytes
SHA-256: 6c08887b596ecb472c5a0482df8c2f828d83fc5b5d16111ed0caa1fced1b35dc