Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2662b05f669f976…

MALICIOUS

PDF

87.5 KB Created: 2021-03-24 05:32:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 685eb4a240340833f43e4141ccdfbc9d SHA-1: ef113d7e62f3a76c3898e50bfa8be1f8c3154369 SHA-256: e2662b05f669f97682309c0745d973a9cf66f42b8a0613e06f429a5f99cc246b
96 Risk Score

Malware Insights

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

The PDF file contains a lure related to learning English quickly, directing the user to a suspicious URL. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/award?keyword=como+aprender+ingles+rapido+pdf
    • https://cdn-cms.f-static.net/uploads/4470222/normal_5fd8fd2bdaf52.pdf
    • https://cdn-cms.f-static.net/uploads/4503050/normal_604bb802882cd.pdf
    • http://jedusajinud.mygamesonline.org/history_of_greek_language.pdf
    • http://jalazekesofijot.medianewsonline.com/how_to_make_creamy_lemon_garlic_sauce.pdf
    • http://lifokuvaxodime.iblogger.org/29907313728.pdf
    • http://zomoxoxuriw.mypressonline.com/what_is_cognition_in_psychology.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://ddb1515c-011f-4d6c-9a6c-b305a2039a85.filesusr.com/ugd/477ac5_932234c8320b46b7b7a84291d01035b0.pdf?index=true
    • http://xumasadepa.epizy.com/dijiledagitibilonulisovi.pdf
    • https://uploads.strikinglycdn.com/files/a7269446-3793-4ffe-a32b-9034a46a0b8d/74404428737.pdf
    • http://xuwunokebisul.rf.gd/video_file_compressor.pdf
    • https://f635e5d9-31b1-4f19-b758-7a623be10181.filesusr.com/ugd/6cf0f5_5f47022715994b92b32f50c8b31f1022.pdf?index=true
    • https://s3.amazonaws.com/zulezov/tmaxx_2.5_transmission.pdf
    • https://s3.amazonaws.com/kitakilesa/55290568185.pdf
    • https://882e4f53-a7e1-4d4a-89e8-a6e6d9f9b805.filesusr.com/ugd/9a13d2_2da5a5cd74ca4341bc7265cbff28bb59.pdf?index=true
    • https://s3.amazonaws.com/difigomisosak/1984582866.pdf
    • http://nijibexegajeson.epizy.com/how_to_adjust_oster_clipper_blades.pdf
    • http://japamitafixe.myartsonline.com/aydn_trk_ateizmi_anlamak.pdf
    • https://uploads.strikinglycdn.com/files/ff648951-d670-4be9-9277-1ef0b8370667/jerarquia_de_valores_humanos.pdf
    • https://uploads.strikinglycdn.com/files/815c18a3-018e-4221-b2b1-e3d5ecc3e3bd/11670637809.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff9f.bin
558982841c0c9e34b5e6735fe66807af9c3effab56f4bc0c8577326568b32379		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF9F 5268 bytes
font_01_sfnt_off00011170.bin
ad2cb772cac6f4699d2f101f6704da02649f368ce8845ed4c3e1775d7558f15b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11170 12392 bytes
font_02_sfnt_off000139d3.bin
a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x139D3 16204 bytes

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