Malicious PDF — malware analysis report

Static analysis result for SHA-256 26d0319f10b1020d…

MALICIOUS

PDF

75.3 KB Created: 2021-03-24 09:36:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 826c596677f5da4ddd6c3069bea216aa SHA-1: 50e6d1b27bb1003246836b1de819c8576ce803b2 SHA-256: 26d0319f10b1020d0dfe80e12956f024e40ffecc213276be8a64c94eee348185
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, identified as a phishing or malware distribution attempt by ClamAV and an ML classifier. The document body, though heavily obfuscated, suggests a lure related to educational content ('Slope fields worksheet'). The presence of embedded URLs and the overall detection by multiple security tools strongly indicate malicious intent, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/wix?keyword=slope+fields+worksheet
    • http://palopej.sportsontheweb.net/linux_shell_script_tutorial.pdf
    • https://cdn-cms.f-static.net/uploads/4366319/normal_60153dcd13051.pdf
    • http://gafuvufafokujop.sportsontheweb.net/whats_the_cheapest_way_to_build_a_tiny_home.pdf
    • http://zaxevef.getenjoyment.net/dir-868l_unifi_setup.pdf
    • http://jelusuvobirolen.mywebcommunity.org/acca_f9_financial_management_study_text.pdf
    • https://cdn-cms.f-static.net/uploads/4374175/normal_605a73fbea8ba.pdf
    • http://zumewidife.mygamesonline.org/diccionario_frances_espaol_larousse_pocket.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zodawanuror/cantina_band_sheet_music_piano_free.pdf
    • http://lojabupabavize.onlinewebshop.net/jutugilezezaz.pdf
    • http://sajoveguduv.onlinewebshop.net/candidiasis_oral_tratamiento_en_nios.pdf
    • https://0f8fedcd-12c0-4678-86f8-e2bff7269121.filesusr.com/ugd/70e7d4_0eac341ec4b84dc389060ac0d562011e.pdf?index=true
    • https://c03439ef-6557-4199-865e-586791a52b6c.filesusr.com/ugd/6bb4a2_9ed45539624d4f9c8fdcd40c49936889.pdf?index=true
    • https://s3.amazonaws.com/tuletivotarupu/3056746837.pdf
    • https://uploads.strikinglycdn.com/files/7ac39c0a-7b04-4ceb-bd43-8c3deea76a06/18333288164.pdf
    • https://uploads.strikinglycdn.com/files/b4a33353-ae6e-4268-bcc1-0f4185e6d82e/honda_fourtrax_350_idle_adjustment.pdf
    • https://s3.amazonaws.com/sefepugolupalax/vutawapali.pdf
    • https://uploads.strikinglycdn.com/files/cd56afe3-a378-4798-83c9-1523badf357a/85947501824.pdf
    • https://s3.amazonaws.com/jitimesolagun/dj_tapas_song_2018.pdf
    • https://s3.amazonaws.com/zuguvoxoki/gipetozurobafedetor.pdf
    • http://naxesabefadufu.atwebpages.com/92378677892.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_off0000e986.bin
df9843d3d8dc76cd11b87b51b73f705d7107792b74bb31b239ead02454705176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE986 5176 bytes
font_01_sfnt_off0000fb32.bin
708b1c524dcd6d1f4efe92d6f86312d0be1d4d7b0fc67ff9f5cbf90b92b3c3c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB32 10908 bytes

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