Malicious PDF — malware analysis report

Static analysis result for SHA-256 099869eb4b9edea9…

MALICIOUS

PDF

80.6 KB Created: 2021-04-06 15:11:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 80cf85f485a27dd5db63176cf30cec5f SHA-1: 207b8f2f1929042e85deeda2ac9576a28510b4ba SHA-256: 099869eb4b9edea950d1f8dc86647ce4bb640749e1d62e97a1d7917f49ac2e88
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, including one pointing to 'maypoin.ru', suggesting it's designed to redirect users to potentially harmful websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating the PDF is part of a link farm on disposable hosting, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://maypoin.ru/strik?utm_term=how+to+make+a+heart+with+rectangular+paper PDF link annotation
    • https://nusemidokiz.weebly.com/uploads/1/3/5/3/135395372/8252210.pdfIn PDF document text
    • http://manapuzasupin.sportsontheweb.net/mpsc_books_in_marathi_file_download.pdfIn PDF document text
    • https://cdn.sqhk.co/jolodovi/jEulxgg/class_appraisal_login.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408346/normal_6052da1c9f47a.pdfIn PDF document text
    • https://cdn.sqhk.co/xibetevoxaj/fhagj7M/5492093855.pdfIn PDF document text
    • http://zotagur.22web.org/asakusa_station_map.pdfIn PDF document text
    • https://zarujedoxetuj.weebly.com/uploads/1/3/4/3/134313760/416a132a.pdfIn PDF document text
    • https://cdn.sqhk.co/gosukutusu/ejgg9hj/tikezoluselo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366014/normal_5fed017e1e195.pdfIn PDF document text
    • https://cdn.sqhk.co/xotosira/ghgiQE1/pamumawifuvenuri.pdfIn PDF document text
    • http://feludekinopotas.scienceontheweb.net/representation_theory_and_complex_geometry.pdfIn PDF document text
    • http://vizilirudigub.getenjoyment.net/miss_behave_book.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471958/normal_6056af4d0fb4f.pdfIn PDF document text
    • http://fonixeguga.mywebcommunity.org/agronomic_practices_of_field_crops.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gegenig.epizy.com/59822890888.pdfIn PDF document text
    • http://fezabum.rf.gd/sotapugutovubijuzewa.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/hankyu_hanshin_holdings_annual_report_2018.pdfIn PDF document text
    • http://nerusejide.rf.gd/laboratory_report_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/68133117248.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/gogoxeweturitomomijosiw.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/red_dead_redemption_2_full_trophy_list_ps4.pdfIn PDF document text
    • http://wumoxafu.epizy.com/slickdeals_laptop_spreadsheet.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/jinutuwaron.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://scripts.sil.org/OFLIn 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_off0000e7ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AB 5288 bytes
SHA-256: 75f4bb5bc94a133013c1e57f26b7f16d2dda06f437dff42b00f123f6c0d4cb0d
font_01_sfnt_off0000f988.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF988 10864 bytes
SHA-256: fc73db9e0a4ffbbef9b0d60a4f6c31a4410300f8facad53c10af8ca792964a8b
font_02_sfnt_off00011ecb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ECB 16316 bytes
SHA-256: 53fbf3b16595d4973403a8a9d1d35098450dccde95118dc344df97508cfc2526

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