Malicious PDF — malware analysis report

Static analysis result for SHA-256 372f1ba2ee192b0f…

MALICIOUS

PDF

111.5 KB Created: 2021-03-23 15:49:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: f763db78781c89b0f85d4beafc479ab3 SHA-1: 24928a728460636299afcff9cb403bbd9211a4c5 SHA-256: 372f1ba2ee192b0ff4e5f3cbcc2566e0eb377c0fc089a3f7418b9af6cc635733
104 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'https://maypoin.ru/wix?keyword=desert+rifle+2+download', which is likely the download location for a secondary payload. The presence of a visual download button further supports the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=desert+rifle+2+download PDF link annotation
    • http://zakoroxani.22web.org/bhavesh_joshi_movie_mp4moviez.pdfIn PDF document text
    • http://takilajonireko.22web.org/jurnal_hernia_inguinalis.pdfIn PDF document text
    • http://tupaxeguna.scienceontheweb.net/65523395090.pdfIn PDF document text
    • http://siviveko.getenjoyment.net/vobana.pdfIn PDF document text
    • http://misitaka.iblogger.org/purinapopafobiw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386622/normal_604a668737354.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426812/normal_603cf5a738e0a.pdfIn PDF document text
    • http://dawajilimomod.iblogger.org/do_reloading_primers_go_bad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382421/normal_6059746c417b7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/samubibapof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2ea8bae-644e-4712-ab34-4ae628129994/how_to_pass_the_vision_test_at_the_dmv.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/literary_theory_an_introduction_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18d7883e-1728-418f-86c3-5a9e9da0f478/wumaxiwetetimugazubidi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/737b073c-b9a5-4173-b7d7-0b69eccb76f7/87699859123.pdfIn PDF document text
    • http://deravamosu.rf.gd/a_handbook_for_seismic_data_acquisition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69c8e5c8-b81e-4132-819e-bfb280da8811/pentair_intellichlor_ic60_flow_switch.pdfIn PDF document text
    • http://bugazepoja.onlinewebshop.net/nyc_subway_map_download.pdfIn PDF document text
    • http://foraxevub.rf.gd/11738232132.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromopelurab/4315125209.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/ancient_egypt_test.pdfIn PDF document text
    • https://s3.amazonaws.com/vebisop/65260803663.pdfIn PDF document text
    • http://tagapibit.epizy.com/los_juegos_del_hambre_1_pelicula_completa_en_espaol_gratis_2012.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001504f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1504F 6440 bytes
SHA-256: 2ce5a7286efefc5aae27ce1c31b3347e159d00bd30cf97f509a0b7f7d49caffb
font_01_sfnt_off00016044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16044 5124 bytes
SHA-256: 3076febf9304d717e5eac5ec4f4cea709a65fc84ad4e2da5bec667e927036255
font_02_sfnt_off000171d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x171D7 12068 bytes
SHA-256: 3938554ebd2e6cf64aab58c796c3ae0998012df0e0dc10b93b76a45cace0d97b
font_03_sfnt_off00019b56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19B56 16036 bytes
SHA-256: 35d3440dae1ebc896564e4e6f70ea95aa3a30a1ac603c7fffbb21b68b8b72e2f

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