Malicious PDF — malware analysis report

Static analysis result for SHA-256 657e4cb07d842f8b…

MALICIOUS

PDF

78.1 KB Created: 2021-02-25 03:44:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 37465169bdf17d7773e4fdfb880746af SHA-1: 739177bf1f8b79399fdcfa13bc3f6bb39d594290 SHA-256: 657e4cb07d842f8be31fc730f894d717fbef945961c3fe52efb63b4b71451cfc
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, contains text related to computer connectivity issues, suggesting a lure. An external URI, 'https://bologen.ru/strik?utm_term=why+is+my+computer+not+connecting+to+websites', was extracted, which is likely the malicious destination.

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://bologen.ru/strik?utm_term=why+is+my+computer+not+connecting+to+websites PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4468536/normal_60026de7d53d8.pdfIn PDF document text
    • https://cdn.sqhk.co/dutigimomana/SE2jhih/anonymous_face_mask.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451047/normal_5fe872a13d345.pdfIn PDF document text
    • https://cdn.sqhk.co/jenotefi/bicYicF/3893679070.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/vovovenogafu.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/28697230959.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/11002208746.pdfIn PDF document text
    • https://s3.amazonaws.com/bufipevuril/xatafovawuv.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/wadenagedimexurumikiboj.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/aerospace_industry_association_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/dd_dungeon_tiles.pdfIn PDF document text
    • https://s3.amazonaws.com/xapota/tom_clancy_rainbow_six_siege_ps4_single_player.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/casper_the_friendly_ghost_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/buzejekadubemedunegaz.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/king_size_cotton_bed_sheets_online.pdfIn PDF document text
    • https://s3.amazonaws.com/nabifovu/airbrush_easy_photo_editor_mod_apk.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D5 5452 bytes
SHA-256: 98874d872f3c4af68fc35967ed76c8c8598042f96221d1e2d1dbccf7f3a172f6
font_01_sfnt_off00010759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10759 10568 bytes
SHA-256: 781b625604333e3da3880f4c3285a17c6a83eb9fb9545976ce98c10a57ffde13

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