Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bff36af9e2f5fed…

MALICIOUS

PDF

107.8 KB Created: 2021-02-14 11:48:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 5dbab998d8a1b8a5437dc89305ae820e SHA-1: bbb20d35e6ef1894304528eba68c6991e4ba7b4d SHA-256: 8bff36af9e2f5fedb2879c74ab43cc86bb9e5e0b2dabb97435f5958adab4206f
96 Risk Score

Malware Insights

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

The file is a PDF that contains numerous embedded URLs, one of which, 'https://jacksth.ru/wix?keyword=international+business+environments+and+operations+15th+edition+pdf+free', is flagged as suspicious. ClamAV detection and ML classification strongly indicate maliciousness, classifying it as a phishing trojan. The document body, though heavily obfuscated, appears to be related to the search query for an ebook, suggesting a lure for users seeking free content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/wix?keyword=international+business+environments+and+operations+15th+edition+pdf+free PDF link annotation
    • http://smartcreditscore.info/ludegogipanodo8vk25.pdfIn PDF document text
    • http://help-feedback-amzn3.xyz/34607008838p0dwp.pdfIn PDF document text
    • http://bunnygummy.ru/mamojaxebetavunesejuwxmkg.pdfIn PDF document text
    • http://wiinorama.website/object_shredder_booyah_bombxdzlk.pdfIn PDF document text
    • http://tovelksa.website/cyberpunk_2020_night_city_mapa3zk3.pdfIn PDF document text
    • http://bafalumej.iblogger.org/somagotesiz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://minuwugonobusuw.epizy.com/45681759379.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/3d_tuning_mod_unlocked.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/osrs_mimic_boss_fight_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/49568944210.pdfIn PDF document text
    • http://pukewideje.epizy.com/61265700959.pdfIn PDF document text
    • http://diverozisutujew.epizy.com/james_river_croaker_fishing_report_2019.pdfIn PDF document text
    • http://sijopar.epizy.com/ms_excel_stock_inventory_template.pdfIn PDF document text
    • http://levowemorunob.epizy.com/sonalivaropozup.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/renukedasi.pdfIn PDF document text
    • http://pomababotesu.rf.gd/boxed_font_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/jaguars_injury_report_week_7.pdfIn PDF document text
    • http://dinopug.epizy.com/konuja.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/jasper_report_documentation.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/sapixifodesefoxotuzibuk.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_off00014aec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AEC 5592 bytes
SHA-256: 84fd3a7c27803639f2fde3719bf68f489868b48329cd4dd8b582c03fa1d4349e
font_01_sfnt_off00015dce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DCE 14748 bytes
SHA-256: d65e8b14d17c0a01312c03cce5870b0239a6c0e835ef64c9175cc2ba17536908
font_02_sfnt_off00018bf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18BF4 16060 bytes
SHA-256: d78d7cc1a68daa951b4fbccbcfb906d5a08ad384f187125596154666a45abe72

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