Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d6efec43663a88b…

MALICIOUS

PDF

77.0 KB Created: 2021-03-12 17:30:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 737f2fc34e8d12a8504557ff52f1a19d SHA-1: a7fdc15261bdd0a101519c0954380b877957f847 SHA-256: 5d6efec43663a88ba6e5fc9bd583571d66851a63a072cd8079b07e5698b1240c
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 URL pointing to a suspicious domain, likely intended to host or redirect to a malicious payload. The document body, though heavily obfuscated, suggests a lure related to 'cursive handwriting practice pdf for kindergarten', aligning with phishing or social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://midufefew.ru/wix?keyword=cursive+handwriting+practice+pdf+for+kindergarten
    • https://cdn.sqhk.co/fazejitev/oiUhbia/luril.pdf
    • http://g2am2e.xyz/livewudwgqgv.pdf
    • http://webmastervlad.ru/bilewunerevotogijipedatkfm4.pdf
    • https://cdn.sqhk.co/gidulikegel/hbgeFhd/pvp_skins_para_minecraft_pe.pdf
    • http://podipotekoi.ru/fufubolape2s6hv.pdf
    • https://cdn.sqhk.co/fixuzigetir/gkHumt5/download_game_real_drum_heroes_mod_apk.pdf
    • https://cdn.sqhk.co/rizijuwet/iijivaE/94360085259.pdf
    • https://cdn.sqhk.co/lituxopevuk/jghArja/sniper_arena_pvp_army_shooter_hack_apk.pdf
    • https://cdn.sqhk.co/nemazuwigumo/ex62hcp/jiposavomapi.pdf
    • https://cdn.sqhk.co/tokofape/NidjjTW/87659134665.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/521fa017-768f-4c6c-ac2c-ab4c941432f8/mini_dv_md80_driver_download.pdf
    • https://uploads.strikinglycdn.com/files/dfec5096-b2a6-4ba2-900b-00697336217a/genome_therapeutics_stock_symbol.pdf
    • https://uploads.strikinglycdn.com/files/19ccd065-1fd1-43ec-883f-ea180fc18717/under_the_dome_age_rating.pdf
    • https://s3.amazonaws.com/bajapovogam/babbu_maan_kabza_song_mr_jatt.pdf
    • https://uploads.strikinglycdn.com/files/e1bbda35-cbfb-4f9c-84c3-76800f088c5f/55934188196.pdf
    • https://uploads.strikinglycdn.com/files/564efa37-60b8-482a-a57b-4c09518dddbe/imagery_in_romeo_and_juliet_act_3_scene_2.pdf
    • https://s3.amazonaws.com/muxegeza/linkedin_android_app_invalid_login.pdf
    • https://uploads.strikinglycdn.com/files/74e196b9-c9f6-454c-846a-4c225db72c2f/mesikalokovat.pdf
    • https://uploads.strikinglycdn.com/files/d5b8c3e9-99a5-465e-bacc-330d495b9c0e/tolilozeruk.pdf
    • https://uploads.strikinglycdn.com/files/91471f75-810c-4435-a945-6f48d6c41424/15326379878.pdf
    • https://uploads.strikinglycdn.com/files/c8e29bea-2833-4f8f-9a7c-e3c39f28dec4/97145095701.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_off0000ef96.bin
d63908c5bb267617030ed4d3b0c2233199b9a2f4aa446918f5e0df4a4038f93b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF96 5504 bytes
font_01_sfnt_off0001026a.bin
6e8e82997db61e085cab4d9c606057129e0878303cdc831bf477ec4239945da7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1026A 10412 bytes

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