Malicious PDF — malware analysis report

Static analysis result for SHA-256 11bb4e0d9cd3ade0…

MALICIOUS

PDF

73.3 KB Created: 2021-03-31 07:21:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c39e946b87ff22e9a7189ce6b77738e7 SHA-1: f5d7ae4203b58ea9f146ac3dfb011eaba5322bb6 SHA-256: 11bb4e0d9cd3ade0f7a1fa7c6ad981f9cb5a1c6ffaad2688d7a0cb227d7507e3
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of numerous embedded URLs, many pointing to PDF files hosted on various domains, suggests a phishing or credential harvesting campaign. The document body, though heavily obfuscated, contains metadata related to PDF creation, further supporting its role as a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 http://optalpha.com/terminator_6_dark_fate_full_movie_20194rlh7.pdf
    • https://bewevirat.weebly.com/uploads/1/3/1/4/131437926/9232701.pdf
    • http://grandov.pro/what_are_visual_learning_tools8g7fb.pdf
    • http://itasda.online/78591705477hayii.pdf
    • https://cdn-cms.f-static.net/uploads/4482671/normal_600f2442c82ab.pdf
    • http://firstsecu-paypal.com/sazevutaq261e.pdf
    • https://renudufodajofi.weebly.com/uploads/1/3/4/8/134884992/0fceffcd1d0d439.pdf
    • http://indir-kazan.com/minecraft_2._0_download_20206ioq5.pdf
    • http://avto-document.site/manual_de_camara_nikon_coolpix_p6103qxdb.pdf
    • https://cdn-cms.f-static.net/uploads/4386081/normal_602a254d00213.pdf
    • http://allroadkamchatka.ru/35218692293ih8he.pdf
    • https://lagubezawepafu.weebly.com/uploads/1/3/1/8/131856446/3816159.pdf
    • https://fekanarikivokil.weebly.com/uploads/1/3/4/8/134884633/1127022.pdf
    • https://pelunukemuf.weebly.com/uploads/1/3/0/7/130776607/vowowugug-funova-sigidakulawa.pdf
    • http://manekobe.22web.org/angkor_wat_tour_guide_review.pdf
    • https://cdn-cms.f-static.net/uploads/4495271/normal_604da91bd2a41.pdf
    • http://bellissimo.online/809482950824szyd.pdf
    • http://espaceabonne.com/malformation_de_chiari_type_1_et_2yzgxh.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://feedproxy.google.com/~r/wb/ENAH/~3/kMuynZNWtA0/wb?keyword=kobalt%20paint%20sprayer%20not%20spraying
    • http://sejojoxo.epizy.com/73010065245.pdf
    • https://s3.amazonaws.com/kabisebax/glamglow_bubble_sheet_mask_india.pdf
    • https://s3.amazonaws.com/figidireki/18690090160.pdf
    • https://s3.amazonaws.com/tidigudetefumof/accident_kannada_film_songs.pdf
    • https://s3.amazonaws.com/bifadiwuwileji/adobe_acrobat_reader_dc_page.pdf
    • https://s3.amazonaws.com/sugowubuf/jacoco_code_coverage_report_maven_command.pdf
    • http://zepaxawom.rf.gd/box_tv_app_for_android.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_off0000e2dd.bin
f7f8fd0b9f6bff8efa1448dd6cd810d75dc5ac2221dbac0456bb8c9fee315f32		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DD 5200 bytes
font_01_sfnt_off0000f4a5.bin
823fcd57f265cd36f371095071a818b174b801f3ee0920f981cc114184ef6f6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A5 10272 bytes

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