Malicious PDF — malware analysis report

Static analysis result for SHA-256 23f4b7fe318b8f3b…

MALICIOUS

PDF

69.1 KB Created: 2021-01-21 12:53:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 26e6d8bcef8221a5b72fe5f7e76f879d SHA-1: 9b2fe703382993b0f9b9c3bdacf4bff424da0a30 SHA-256: 23f4b7fe318b8f3bafcd8292020817d8b00a1d0ced27b0dfebd89d25d0aee291
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/aws?utm_term=arquitectura+sostenible+lexus+pdf'. This URL is likely used to redirect the user to a malicious site. The ML classifier and ClamAV also flagged this PDF as malicious, indicating a high likelihood of malicious intent. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://gettraff.ru/aws?utm_term=arquitectura+sostenible+lexus+pdf In PDF document text
    • https://cdn.sqhk.co/jasowipe/saNibpe/the_lost_vikings_android_apk.pdfIn PDF document text
    • http://velixone.66ghz.com/archicad_20_mac_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372361/normal_5fd893908522d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456984/normal_5fe8c700732f1.pdfIn PDF document text
    • http://wusodopepufex.66ghz.com/nokia_5233_age_calculator_app.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460690/normal_5fdaa99d8487a.pdfIn PDF document text
    • https://cdn.sqhk.co/bugolajoxodu/ghygdQU/ganufepubazesasi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gizamir.epizy.com/fikipikujejomisedak.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/44858601119.pdfIn PDF document text
    • https://s3.amazonaws.com/zulezov/30728184265.pdfIn PDF document text
    • http://zuwarikufaz.epizy.com/75905286817.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/ccna_guide_to_cisco_networking_fundamentals.pdfIn PDF document text
    • http://sonowodiguvab.epizy.com/video_format_converter_software_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/31494775652.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/wuludonevanifixes.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/pevazikam.pdfIn PDF document text
    • http://lubesugoninop.epizy.com/drama_china_princess_agents_season_2.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/eso_maelstrom_arena_guide_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/study_spanish_ser_and_estar_quiz_answers.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_off0000cfb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFB1 5472 bytes
SHA-256: 91ea146dde01ab00f05af5d8494e9e83e6067e525b1af2fb216d03595ef8b45f
font_01_sfnt_off0000e254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE254 11156 bytes
SHA-256: b6eaf73db18bade118ff1e82ed66ac48cac4127c7149d6d0f61c3052e088d0bf

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