Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f9891ed59ff8916…

MALICIOUS

PDF

83.6 KB Created: 2021-03-12 14:43:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc0aef05e1eaa0e1d3477bdf2816b163 SHA-1: 273eab28756dee1fc0aed054c7480860dfe8ce1b SHA-256: 5f9891ed59ff8916c4de860d47c5797c2963c547286235795d230f784522551e
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URL disguised as a legitimate document. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URL likely leads to a phishing page or a second-stage malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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/award?keyword=dumbbell+exercises+for+arms+and+shoulders+pdf
    • https://tuxutumixebapi.weebly.com/uploads/1/3/1/4/131438514/lefibukuded.pdf
    • https://guzepebizosi.weebly.com/uploads/1/3/4/8/134880367/1ebfb80a9.pdf
    • http://profit-makers.club/575784428854pfr2.pdf
    • http://disconto50.info/ley_4_2017_canarias_libro_azulxr2pf.pdf
    • https://cdn-cms.f-static.net/uploads/4451930/normal_60255957d1207.pdf
    • https://cdn-cms.f-static.net/uploads/4409806/normal_60328fdbdb9fa.pdf
    • https://static.s123-cdn-static.com/uploads/4477155/normal_5fc71006e1ddb.pdf
    • https://static.s123-cdn-static.com/uploads/4388173/normal_5fc67782cab4a.pdf
    • https://cdn-cms.f-static.net/uploads/4425511/normal_600ae02955f72.pdf
    • http://potenciy.xyz/poniniruvelonukiridokb8iiu.pdf
    • http://dofoziteda.iblogger.org/safari_browser_support_video_format.pdf
    • http://memaberenux.scienceontheweb.net/smoothie_king_job_application.pdf
    • http://najetaxu.mygamesonline.org/27278307779.pdf
    • http://epipog.com/bissell_spotclean_pet_pro_portable_carpet_cleaner_3624ptk2g.pdf
    • https://nugaxuraru.weebly.com/uploads/1/3/5/3/135388114/fowumoxa-munaloti-dowivof-sejoxeziv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xugekevilop.rf.gd/outlander_series_paperback_books.pdf
    • http://ripifozuj.rf.gd/xufubarukapadukorilavog.pdf
    • http://laxuraxosolun.epizy.com/application_form_for_child_care_subsidy_ontario.pdf
    • http://wugujub.onlinewebshop.net/proving_triangles_congruent_using_sss_sas_aas_and_asa_worksheet_answers.pdf
    • https://uploads.strikinglycdn.com/files/0f569826-cddb-4ab6-9e4f-84557c883037/braun_coffee_maker_clean_light.pdf
    • https://uploads.strikinglycdn.com/files/9ac24b73-6ad6-4602-8036-8582f6560716/17527398565.pdf
    • http://zisukuvi.atwebpages.com/82493974498.pdf
    • https://uploads.strikinglycdn.com/files/7f80c7b4-546b-4b72-9b35-ad9b8d3a047e/hp_laserjet_1100_driver_windows_10.pdf
    • http://vamivesuger.epizy.com/wedding_anniversary_song.pdf
    • https://uploads.strikinglycdn.com/files/88708d65-bd9a-46a4-aa98-7b5577b4a2da/sekamijubajupuzexozatirig.pdf
    • https://uploads.strikinglycdn.com/files/60fac8d6-baa1-415a-936f-258dcd8644b8/59745907694.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_off00010b81.bin
aee03056d68c97cf5736a21908187bfa857ceaeb2731277cf71ac85e17810b34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B81 5604 bytes
font_01_sfnt_off00011e64.bin
6f902d76b31bb035d9930636be1357b638aad555c1e37e2b3622196f728e2376		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E64 10032 bytes

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