Malicious PDF — malware analysis report

Static analysis result for SHA-256 dced8df882e292e9…

MALICIOUS

PDF

110.5 KB Created: 2021-03-23 00:14:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7d8c913e7fd77bd77525a235a723801 SHA-1: 9656f8c82dc5b24f9c01abbcab6e9ad759a5cd84 SHA-256: dced8df882e292e902b273482eece5132e2aec78a2511928e0a2bc602176bb19
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 by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged it as highly malicious. The document body, though heavily obfuscated, appears to be related to academic content, suggesting a lure to trick users into visiting the malicious URL for phishing or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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=titration+curves+of+polyprotic+acids+lab+report+chegg
    • http://valuburikodajad.medianewsonline.com/ejercicios_ingles_adverbios_de_frecuencia_5_primaria.pdf
    • https://mejibafizafev.weebly.com/uploads/1/3/4/0/134042836/9e470154da0a3.pdf
    • http://dikoxikikalonib.scienceontheweb.net/43870972645.pdf
    • http://labifovejes.mypressonline.com/29394540043.pdf
    • http://insuranceautousa.com/6999689015azuu.pdf
    • https://nogetutiru.weebly.com/uploads/1/3/4/7/134711470/2125331.pdf
    • https://neverazu.weebly.com/uploads/1/3/4/9/134901342/8586454.pdf
    • http://frankiearvelo.com/descargar_mma_fighting_clash_hackf24t0.pdf
    • http://ravovenovibu.medianewsonline.com/15389850000.pdf
    • http://deromgroup.com/how_to_put_a_clock_movement_back_togethergkoqw.pdf
    • http://devubowoku.mypressonline.com/direito_penal_3_bitencourt.pdf
    • https://kazigujexumakul.weebly.com/uploads/1/3/4/3/134320364/fagupiz_modanen_dawivobufomi.pdf
    • http://zzzmmmmejjj.space/winner_soccer_evolution_mod_apk_android_1uon6v.pdf
    • https://mezamavizasiv.weebly.com/uploads/1/3/5/3/135312133/xiseboforemujixuwog.pdf
    • http://metryck.info/3951808922yped5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/40ac4190-71e9-468f-80d0-245bf78fdf0b/zebitewonupedexis.pdf
    • https://uploads.strikinglycdn.com/files/75f268e5-ff0a-4570-b44e-0324a7752443/24531505221.pdf
    • https://uploads.strikinglycdn.com/files/e24f1e3c-432d-4f42-9790-7c2b23c4eed5/us_military_phonetic_alphabet_history.pdf
    • https://uploads.strikinglycdn.com/files/1c3fa447-1b4f-460b-90af-cecda1901352/what_does_the_cannibalistic_monster_symbolize.pdf
    • http://tuwutexo.onlinewebshop.net/how_to_reset_mettler_toledo_scale_ps60.pdf
    • https://s3.amazonaws.com/potofaw/amazon_sales_reporting_software.pdf
    • https://uploads.strikinglycdn.com/files/ccf4e5f5-1085-45ec-8696-76a333dce445/how_to_reset_income_tax_password_through_dsc.pdf
    • https://s3.amazonaws.com/dowesitobuga/jump_rope_fitness_plan.pdf
    • https://s3.amazonaws.com/marimejerebo/jadekemeka.pdf
    • http://wororezijetixa.atwebpages.com/diagnosa_keperawatan_bronkopneumonia.pdf
    • https://s3.amazonaws.com/mavixu/bahubali_1_cinema_ing_telugu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000160db.bin
c754879f35cf667d5c5b0449bf7b7884ad17765573ae5fcd8bfe39c540121b62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x160DB 2996 bytes
font_01_sfnt_off00016b9d.bin
dee029e6b3a4376926ad3dd6c92a3625b6543c2c280533099e4ccf903ae83e10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16B9D 5668 bytes
font_02_sfnt_off00017ee8.bin
45136e3a0f71c211db40dce2585426aeb96d4880bc812158b307d8a927e96825		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17EE8 13112 bytes

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