Malicious PDF — malware analysis report

Static analysis result for SHA-256 a59c0e13d8e7292e…

MALICIOUS

PDF

80.1 KB Created: 2021-03-23 14:54:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e8a276fb6e400338c0146e9ed4f5027 SHA-1: ddf7818a5346996f8a60b1c80033bec23e68b364 SHA-256: a59c0e13d8e7292e8fe44cd786ae99f87d7c852282a7db2063418c2c752f657e
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to educational content, suggesting a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://resalured.ru/wix?keyword=phet+isotopes+and+atomic+mass+model+3+answer+key
    • http://mediaverifiedbadge.com/ways_to_remind_yourselfo5krl.pdf
    • http://madamzero.com/gedifokewif40h1e.pdf
    • http://zakewabo.scienceontheweb.net/61325574446.pdf
    • http://rexonina.medianewsonline.com/relomada.pdf
    • http://sewawena.scienceontheweb.net/split_merge_free_download.pdf
    • http://revershjtb.site/ley_general_de_titulos_y_operaciones_de_credito_que_esedovu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/luxaduzimase/linking_verbs_worksheet_grade_7.pdf
    • https://uploads.strikinglycdn.com/files/83fbaf50-f3de-4e3d-a18b-74a0815563e6/what_is_strategic_planning_in_urban_planning.pdf
    • https://uploads.strikinglycdn.com/files/e1909611-23fb-4b74-82a8-0843f6739a56/what_is_globalisation_explain_impact_of_globalisation_in_india.pdf
    • https://s3.amazonaws.com/xuvamuba/gakefupasugepefibapawi.pdf
    • http://rususekobijo.myartsonline.com/maytag_2000_series_washer_error_codes_lf.pdf
    • https://s3.amazonaws.com/vososasoxumete/casio_fx-_5800p_user_manual.pdf
    • https://s3.amazonaws.com/winumigutam/chair_conformation_cyclohexane.pdf
    • https://s3.amazonaws.com/xuxifuzituwu/joragipijupu.pdf
    • https://uploads.strikinglycdn.com/files/6bc55f7c-561d-4030-a894-fe6e0f0a883f/in_the_mood_for_love_trailer_deutsch.pdf
    • https://s3.amazonaws.com/kujesulad/animation_effects_android_app.pdf
    • http://tulifal.onlinewebshop.net/what_routers_are_compatible_with_dd_wrt.pdf
    • https://s3.amazonaws.com/miwolezedubujoz/broadcaster_pro_manual.pdf
    • https://uploads.strikinglycdn.com/files/e49f9eba-ad37-4c49-bc95-048a0742df05/tudefujaweso.pdf
    • https://s3.amazonaws.com/mokuwanibof/19423783062.pdf
    • https://uploads.strikinglycdn.com/files/dd170acf-526c-4af1-8b06-611e51dce44f/50th_law_robert_greene_quotes.pdf
    • https://s3.amazonaws.com/fizufapu/tasoripometimodawajama.pdf
    • https://uploads.strikinglycdn.com/files/e7d12891-f556-4ec6-95e9-fb6ab34799ac/thora_birch_american_beauty_gif.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_off0000ed29.bin
835430bf2d7220ca071d022e0c5944691bb9cd33794dc581af63cf058a3249b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED29 5524 bytes
font_01_sfnt_off0000ffcc.bin
1e60483fdfa85eceda7c1db616cba404d813e0b5324c93b7a2009c9014a1368c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCC 11228 bytes
font_02_sfnt_off0001248d.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1248D 4324 bytes

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