Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fd4b3e207231e74…

MALICIOUS

PDF

80.8 KB Created: 2021-03-21 08:28:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ca024eaa5d414ecf8a245765563e5ea SHA-1: dc7d02638edc7462c20b9f7491bdb289714ff828 SHA-256: 3fd4b3e207231e7469c761a32aee017eda29f30aced92ca415072154bf5a9246
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a suspicious domain, identified by heuristics as a potential phishing or malicious link. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into visiting a site that may host further malware or phishing content. The document body, though heavily obfuscated, suggests a lure related to academic formatting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=ordenar+bibliograf%25C3%25ADa+apa+online
    • http://xipodijajul.sportsontheweb.net/meeting_agenda_sample.pdf
    • https://cdn.sqhk.co/womafafowix/biajiig/nojeremil.pdf
    • https://cdn.sqhk.co/nuzinirumawe/Ohfhfji/vuwutefikajuzaba.pdf
    • https://cdn.sqhk.co/murafabu/PibS3ib/.pdf
    • https://cdn.sqhk.co/doporaba/cEgg8bY/four_in_a_line_online_multiplayer.pdf
    • https://cdn.sqhk.co/rugugojeba/2TJdvsU/53954236149.pdf
    • https://static.s123-cdn-static.com/uploads/4447437/normal_5fe03f8622281.pdf
    • http://yesnutural.space/como_calcular_incertidumbre_porcentualmtw8a.pdf
    • http://bestcreditcheck.info/marujawanizadiru51ur3.pdf
    • http://zovolexune.sportsontheweb.net/retawelufeseweju.pdf
    • https://cdn-cms.f-static.net/uploads/4463266/normal_60464929967f0.pdf
    • http://manthoughtswebsite.website/programa_arquitectonico_de_un_mercadok7wnq.pdf
    • https://static.s123-cdn-static.com/uploads/4467019/normal_5ffcb7c80370c.pdf
    • https://static.s123-cdn-static.com/uploads/4422894/normal_5fef76e070955.pdf
    • http://novofikupeneda.mywebcommunity.org/ssc_steno_mock_test.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/52e45a11-0f8b-4f1b-8c05-929f84823f01/much_ado_about_nothing_act_1_scene_2_quotes.pdf
    • https://uploads.strikinglycdn.com/files/82f8123b-00a8-4132-a009-a323c88cd845/jesus_mi_fiel_amigo_abel_zavala_letra_y_acordes.pdf
    • https://uploads.strikinglycdn.com/files/7349bab5-07ac-49cd-849b-131be8849662/linksys_wrt54g_v8_review.pdf
    • https://uploads.strikinglycdn.com/files/bf2046ac-fa31-4c2c-94d5-e355967456c5/37992164909.pdf
    • https://uploads.strikinglycdn.com/files/6975ff7e-a407-4126-820e-a98e88fab10a/pentax_k-70_video_quality.pdf
    • http://perexuwofogefo.onlinewebshop.net/whats_the_purpose_of_the_worm_in_tequila.pdf
    • https://uploads.strikinglycdn.com/files/c9f00f12-a324-4277-8393-38bb13a020e9/log_ti_89_titanium.pdf
    • https://uploads.strikinglycdn.com/files/559b2c0d-b9ab-4763-9a0b-6b780a71c8cd/how_to_connect_sony_surround_sound_system.pdf
    • https://uploads.strikinglycdn.com/files/8333b904-d0ab-40b9-8dbc-c581e6562584/weber_spirit_e-210_best_price.pdf
    • http://tikomiwewo.atwebpages.com/99007114760.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_off0000f65e.bin
97a6527bd12c36022f1155009072306b188ad098353c5c4b9a66c2c80f823a76		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF65E 5252 bytes
font_01_sfnt_off00010848.bin
25371d97859d02e91a358edc218da4673de4cf8f04c903edb79f3400f14f4eec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10848 13644 bytes

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