Malicious PDF — malware analysis report

Static analysis result for SHA-256 317f25d71f8f5a2a…

MALICIOUS

PDF

78.3 KB Created: 2021-02-19 11:02:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 4031d65ea23045a5f2c68ef3b22f7d91 SHA-1: af1609517f5139f2bb93c2e1d53438e98bfc5ca5 SHA-256: 317f25d71f8f5a2ab64f1d69d32dd7e2a9e21a0554f52a89f8e55caaef4e827a
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious URL, and multiple other URLs are present within the document. The document body, though heavily obfuscated, suggests a lure related to 'nes tetris online unblocked', likely intended to trick users into visiting the malicious domain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://jottigo.ru/wix?keyword=nes+tetris+online+unblocked PDF link annotation
    • http://romeoplanet.club/hr_scene_summer_camp_guidej9mwd.pdfIn PDF document text
    • https://cdn.sqhk.co/rilixuzewiv/ifjejak/37481364419.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493227/normal_5fdb71a52dac3.pdfIn PDF document text
    • http://on24-system.club/64035862394kh5le.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501810/normal_5fd0f9b905bac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495390/normal_5ff89e2cced7a.pdfIn PDF document text
    • http://mnatural.space/ball_mayhem_unblocked_games_76dw1ai.pdfIn PDF document text
    • http://upgrade4me.com/animal_empire_card_game3o55j.pdfIn PDF document text
    • https://cdn.sqhk.co/vitimosugu/nqhbddx/vampiric_dragon_lord_overlord.pdfIn PDF document text
    • http://simcars.ru/b._s._m._s_application_form_20190ig0i.pdfIn PDF document text
    • https://cdn.sqhk.co/nomelafu/EjcieW8/26579540381.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451210/normal_5ff1c90babd9d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lefivox.epizy.com/ganiwutonigowutakumakevi.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/2084326622.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/24223954761.pdfIn PDF document text
    • https://s3.amazonaws.com/minegikukovel/91165111825.pdfIn PDF document text
    • http://katujomun.rf.gd/bootstrap_admin_panel_template.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/bachelorette_movie_parents_guide.pdfIn PDF document text
    • http://xegebasitez.rf.gd/huttodyake_sayodyake_full_song.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/jedikutovapepu.pdfIn PDF document text
    • https://s3.amazonaws.com/gazivemon/20957530273.pdfIn PDF document text
    • http://bawatusarab.epizy.com/60738953375.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/14394811839.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE8 4896 bytes
SHA-256: 7c1ca38c8cbb4ddd746ac83cf2ec63cd999930ee7538a9964b2272872181f616
font_01_sfnt_off0001009f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1009F 13456 bytes
SHA-256: a9441ca04e4e5fb1fa9ad0269d109af4cf0f92a949becd06013ccae6e5938ea9

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