Malicious PDF — malware analysis report

Static analysis result for SHA-256 f72ee4183005f98a…

MALICIOUS

PDF

77.7 KB Created: 2021-04-03 23:30:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f00f5e57695b2a596e1a38fbb34f8db4 SHA-1: 44276a316604a6e1f60b3cd2347d5d670fd5cd9a SHA-256: f72ee4183005f98a0b88b7ce879c0c0dc5850f23406586ca8a35dee028d29f36
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains multiple embedded URLs, with one specifically linked to a phishing lure related to a 'grammar manual'. The PDF structure and embedded URIs suggest it is designed to redirect users to malicious websites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://druttle.ru/wix?keyword=grammar+manual+p99
    • http://bibuzikufaje.mygamesonline.org/calendar_ortodox_septembrie_2020.pdf
    • http://trysucre.pro/albert_camus_le_mythe_de_sisyphe_commentaireci507.pdf
    • https://cdn.sqhk.co/zuzudumijamo/bfgeU8m/dehati_anpadh_hari_re_video_song.pdf
    • https://static.s123-cdn-static.com/uploads/4474750/normal_6008a9fd68bee.pdf
    • http://afracheat8.xyz/92987263219de6n9.pdf
    • http://ek-arenda.ru/rewejirikekikagatori8ynh6.pdf
    • https://cdn.sqhk.co/zosikoto/TrHVxH0/37187087896.pdf
    • http://mebelintera.ru/pojebuzidetojipedo62cut.pdf
    • https://cdn.sqhk.co/pixafosabow/inl8jhe/pilofilag.pdf
    • https://static.s123-cdn-static.com/uploads/4386597/normal_5febb2f4ade2e.pdf
    • http://feedbacrnz.space/how_to_use_directv_remote_for_tvuozuo.pdf
    • https://cdn.sqhk.co/suwefememe/cjgmhcZ/spotify_maximum_limit.pdf
    • https://cdn.sqhk.co/tiwumixe/uiijc97/define_adamantine_in_a_sentence.pdf
    • http://motarojetox.sportsontheweb.net/introduction_to_gauge_field_theory.pdf
    • http://pogibofabut.getenjoyment.net/tidadipegit.pdf
    • http://virivuluk.getenjoyment.net/tapebaniporu.pdf
    • http://terem.space/5_love_languages_quiz_for_couples03guz.pdf
    • https://cdn.sqhk.co/tezofugowura/ogcjfk5/ruzidi.pdf
    • https://cdn.sqhk.co/moxibusas/hgtuhb9/gun_club_2_hacked_apk.pdf
    • https://cdn-cms.f-static.net/uploads/4413473/normal_601a702321135.pdf
    • https://cdn.sqhk.co/mobobelelu/oA0hhid/infector_of_souls_diablo_2.pdf
    • http://kezijumedet.mypressonline.com/thermax_aptitude_test_papers.pdf
    • https://cdn.sqhk.co/jizuxadif/3ZQ8Gff/coalition_multiplayer_fps_apk_hack.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0000f417.bin
0312bf8aa3a60416778f46c4a884698d9e2f62f74a033e3bda536b05eadbf77b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF417 4976 bytes
font_01_sfnt_off000104e9.bin
de3de9902cfe376370be08b5264685e9ed64e025b69813d91cbd3e46a16fdb96
pdf-font-stream PDF embedded font (sfnt) at offset 0x104E9 10724 bytes