Malicious PDF — malware analysis report

Static analysis result for SHA-256 75809fee0a2fbcd6…

MALICIOUS

PDF

77.8 KB Created: 2021-04-06 22:28:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e78a3da80e127600327c68695ecb7a06 SHA-1: d584abc8443a1d4e5f3f05831b447a17169233ce SHA-256: 75809fee0a2fbcd6ccf650211f9dd1e801be12bd4916869a57e8e2f419f30ba2
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is a strong indicator of malicious intent. The document body, though heavily obfuscated, contains text related to aeronautical phraseology, suggesting a lure to entice users to click the malicious link. The ML classifier and ClamAV detection further confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/award?keyword=fraseologia+aeronautica+en+ingles+oaci+pdf
    • http://beamorem.com/what_religion_follows_the_quranpot0c.pdf
    • http://poopo.ru/91957417125b6d5m.pdf
    • http://paksorond.xyz/donuguzn806n.pdf
    • http://mitsumoro.ru/pentair_superflo_vshkxho.pdf
    • http://waystep.site/photography_and_video_production_business_planmme8e.pdf
    • http://trokot-new.online/paxoxomist5fd6.pdf
    • http://vukabuv.22web.org/thinking_in_java_solutions_guide.pdf
    • http://help-verification.com/mafia_2_health_bug_fix_crack6j0dj.pdf
    • http://trenolgia.buzz/routing_and_switching_essentials_v6rl71k.pdf
    • http://degitowexara.iblogger.org/39710689445.pdf
    • http://cardioactiveuficiale.site/the_crucible_act_1_puritan_problems_character_map8qrse.pdf
    • http://pumba-timon.space/i_hate_you_please_dont_leave_meq5ubt.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gifimedirawi.epizy.com/new_odia_song_dj_2018.pdf
    • https://uploads.strikinglycdn.com/files/41a60f89-164b-4578-9838-ceadf696b1a3/how_to_learn_kali_linux_for_beginners.pdf
    • https://s3.amazonaws.com/bededuxotulapil/three_digit_addition_with_regrouping_worksheets.pdf
    • https://uploads.strikinglycdn.com/files/f99a8f57-2e50-4128-8755-a3a98d9153fe/regulamento_do_imposto_de_renda_rir_99_artigo_311.pdf
    • https://s3.amazonaws.com/suxuzubojut/bosch_dishwasher_she3ar75uc_22_manual.pdf
    • https://uploads.strikinglycdn.com/files/c48c4152-e48f-4a31-9f89-251d38af3c4b/napado.pdf
    • https://85ed388a-52e0-4e79-9737-9d4b769dda71.filesusr.com/ugd/bb10c5_56d16276f37d4ba9b70f27efc6ac5683.pdf?index=true
    • https://s3.amazonaws.com/dujepav/ithuba_national_lottery_app_apk.pdf
    • https://6c639bf1-704a-4500-b661-329758898742.filesusr.com/ugd/02d620_0e2edf77618248d89d00328f5d12e79c.pdf?index=true
    • http://fubuwutunofo.rf.gd/pellegrino_artusi_espaol.pdf
    • https://e29f0852-aa8c-4fc4-a5db-fcd144ab7086.filesusr.com/ugd/b730be_eeb13d02ae2a40adad0591c4e0a25920.pdf?index=true
    • https://s3.amazonaws.com/pesetufavo/84634021032.pdf
    • https://s3.amazonaws.com/fajeloninesitel/sijalawusesujelokudiv.pdf
    • https://41be308f-8a64-4dec-8b30-4937605be974.filesusr.com/ugd/f042fe_2a8bedb735f14d749a5fdd73df8254d6.pdf?index=true
    • https://de461234-8179-4892-b46d-67dc01ae00af.filesusr.com/ugd/69bbc5_06bc71644c5441efbdf9eb8a5456a046.pdf?index=true
    • 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_off0000ef1a.bin
5fac2d4afb36e9a38617235b36c740d4ae2922e10e09d223ec17e29fc260a2a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1A 5276 bytes
font_01_sfnt_off0001011d.bin
78dae7da95b5d8faaa37480c889786dea204d104a732fd203c82c960a326285f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1011D 12052 bytes

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