Malicious PDF — malware analysis report

Static analysis result for SHA-256 d34b0cc259ca8b73…

MALICIOUS

PDF

77.0 KB Created: 2021-03-14 05:14:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e2676d2a84deb829edd353f76fd306c SHA-1: 49009424bb93416650ddb65542f547ee5e0b4d66 SHA-256: d34b0cc259ca8b73135fff5c6bd6dac4cf951f60759fb92e56a5d50b64e78664
96 Risk Score

Malware Insights

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

The PDF document contains embedded URLs that lead to potentially malicious content, as indicated by ML classification and ClamAV detection. The document body, though heavily obfuscated, suggests a lure related to educational material, likely intended to trick users into visiting the provided URLs. The presence of embedded URLs and the nature of the heuristics strongly suggest this file is part of a phishing campaign.

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://jacksth.ru/wix?keyword=finding+x+and+y+intercepts+worksheet+day+1
    • https://cdn.sqhk.co/zufosupiz/j4bhggh/music_equalizer_lite_ultra_sound_bass_boosters.pdf
    • http://fagilef.getenjoyment.net/6213339824.pdf
    • http://vatemuredaxusob.22web.org/fodonir.pdf
    • https://cdn.sqhk.co/muvotugi/gjfghCH/gps_live_navigation_map_directions_and_explore.pdf
    • http://ligugiban.scienceontheweb.net/44469966027.pdf
    • https://cdn.sqhk.co/sesumaku/jh9hcgc/sojunawadetutezogoma.pdf
    • http://xajabuzowa.scienceontheweb.net/94709774591.pdf
    • http://zusiwibewire.mypressonline.com/polilarofazeninawusutepuv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://javirukegeg.rf.gd/schistosoma_japonicum.pdf
    • https://8d59741e-369e-44be-b01e-8fbcb09d2d01.filesusr.com/ugd/7cefa9_8042bf60b41e4c7bb1f2a31537040b06.pdf?index=true
    • https://uploads.strikinglycdn.com/files/276f0e5b-6b14-4e48-a34e-2e5805706e3d/sinopsis_film_the_hunger_games_mockingjay_part_1_2014.pdf
    • https://a52dd608-e7dd-4d50-8005-e0fd7a3896b4.filesusr.com/ugd/43d2fc_7911331b7c994e129bb68efb0ac05ef3.pdf?index=true
    • https://35548484-ce42-4b18-9d9d-834326683263.filesusr.com/ugd/a221b6_91f242d3d18c4531b0acdad6eaf0033d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/e7d1d82e-3083-4353-884d-77bb9bf798e2/fixuxiwexitibijakidasijiw.pdf
    • http://pevutedijubixit.epizy.com/dexcom_g6_user_guide.pdf
    • http://wosamufudov.epizy.com/atualizar_android_mxq_4k.pdf
    • https://fb075467-9d00-46c6-93ac-2b777f5e584b.filesusr.com/ugd/8bcd66_ea9a18b1da0d416bb56332bd9f7a6afd.pdf?index=true
    • http://zerakunutage.epizy.com/19491110308.pdf
    • http://nufitexevav.rf.gd/what_size_tires_are_on_a_2011_dodge_avenger.pdf
    • http://fekobovovexi.epizy.com/buzalidaw.pdf
    • http://fepetixapokurob.myartsonline.com/kenmore_electric_range_element_not_working.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_off0000f25a.bin
cd7604765a92589a25ad8b9f64f6bfa5403860f13495c4077830592f52e82501		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF25A 5636 bytes
font_01_sfnt_off000105b0.bin
d5ca44e5aa47631c1435b5418fee191433d6f7e11d06771457b6ea9dc877e5f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105B0 9792 bytes

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