Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f68b7cf88b5bc08…

MALICIOUS

PDF

75.2 KB Created: 2021-03-08 06:32:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6dd4f499e0066c6f23df6db3b304a52 SHA-1: ec4f2b2605f28b418645c5e8521d6c122ddd6de2 SHA-256: 6f68b7cf88b5bc081b53c21f53fe76145769ea6534aa821c5931c9af0e50bca1
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. The embedded URL 'https://resalured.ru/wix?keyword=barbarian+royale+apk+download' suggests a lure for downloading software. While no scripts were explicitly extracted, the PDF structure and the nature of the URL indicate an attempt to trick the user into downloading a payload, aligning with spearphishing tactics.

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://resalured.ru/wix?keyword=barbarian+royale+apk+download
    • https://cdn-cms.f-static.net/uploads/4496153/normal_6022dc097efca.pdf
    • https://static.s123-cdn-static.com/uploads/4459941/normal_6002d8525c3e7.pdf
    • http://bebetadiruj.mywebcommunity.org/lawaridonaduxi.pdf
    • http://nitapida.mywebcommunity.org/indirect_interview_requests_include_of_all_of_the_following_techniques_except.pdf
    • https://cdn-cms.f-static.net/uploads/4379618/normal_6027379b6c253.pdf
    • http://rozujed.sportsontheweb.net/skin_burning_sensation_on_lower_legs.pdf
    • http://nusowutevu.getenjoyment.net/tomoz.pdf
    • http://midikakuvekume.mywebcommunity.org/gugoj.pdf
    • http://nomenowunesazoz.scienceontheweb.net/mezobaminawonadomarupa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wiwilewito.epizy.com/chakki_atta_nutrition_information.pdf
    • http://jilerixam.epizy.com/xidizonanofikagi.pdf
    • https://s3.amazonaws.com/vosimalume/91555789746.pdf
    • https://s3.amazonaws.com/garorowa/8257333962.pdf
    • http://notijopozij.epizy.com/number_line_addition_worksheets_grade_3.pdf
    • https://1e1f235d-56dd-4976-b20d-d38e3fe7b172.filesusr.com/ugd/210b45_57953004b9764fff8569e6757469c97c.pdf?index=true
    • https://s3.amazonaws.com/zebarufuridorur/hot_wheels_game_for_computer.pdf
    • https://5a4e7950-e122-4b3c-9cf7-894e7f5b1216.filesusr.com/ugd/76aeb6_a983e7b528e143e6ab3a44e58b661748.pdf?index=true
    • http://nudobuz.rf.gd/how_to_scan_multiple_pages_into_one_epson_xp-420.pdf
    • https://s3.amazonaws.com/fopalew/anime_girl_meme_template.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb06.bin
96661a9279f36ea6a02c56bffb96faeed20470db3d59203387a6a64cf82a0380
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB06 5220 bytes
font_01_sfnt_off0000fcec.bin
0adac425e5d1d338ef8297da171f4c431a567e7d53561e0753fe935915b5dedb
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCEC 10160 bytes