Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7b287d3a7c3e2c2…

MALICIOUS

PDF

98.1 KB Created: 2021-03-31 05:41:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea6d5de93a8c90718a19841c987f59e3 SHA-1: 25d5136cb214b14a68d531b81c23f3bc29e798b2 SHA-256: c7b287d3a7c3e2c2bfb8d028509d6170a23ee8532fca0b42a92ee1a5410d47d0
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, such as 'https://seumenha.ru/award?keyword=araby+poem+pdf', suggests the document is designed to redirect users to potentially harmful websites. The PDF structure and embedded content, though obfuscated, are consistent with phishing or malware delivery techniques.

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://seumenha.ru/award?keyword=araby+poem+pdf
    • http://xijipeva.mypressonline.com/catabolismo_de_proteinas_y_aminoacidos.pdf
    • https://cdn.sqhk.co/moturira/heu1hc2/dujokojawotunoxixiset.pdf
    • https://cdn.sqhk.co/konafomaz/hehjeie/youtube_video_downloader_apk_app.pdf
    • http://nimolebefiv.22web.org/accidente_vascular_cerebral_2020.pdf
    • https://cdn.sqhk.co/sebixodof/jjhcjgU/html_invoice_template_lope_free.pdf
    • http://bisapusid.mypressonline.com/kegowimobewufidodukuw.pdf
    • http://fezopezatoxu.22web.org/how_to_draw_cartoon_anatomy.pdf
    • http://bavimobuxadu.medianewsonline.com/academic_english_reading_and_writing_across_the_disciplines_pearson.pdf
    • https://cdn.sqhk.co/wixexozesila/VtZjceW/from_the_sea_to_the_stars.pdf
    • https://cdn.sqhk.co/woberimi/7sifshb/cutting_fruit_master_fruit_slices.pdf
    • http://tigatixe.iblogger.org/mafabokutepuxe.pdf
    • https://cdn.sqhk.co/waxuniwite/uRwkfjf/professional_beautician_resume_format.pdf
    • http://fagilef.getenjoyment.net/schweinaht_bemaung.pdf
    • http://sajiwurejedetu.sportsontheweb.net/calendario_escolar_2020_nicaragua.pdf
    • https://cdn.sqhk.co/sunidoxil/lIVuSuI/attestation_de_loyer__jour.pdf
    • http://zikifogomi.22web.org/sql_join_types_cheat_sheet.pdf
    • http://bafiselavanebep.mywebcommunity.org/33339432260.pdf
    • https://cdn.sqhk.co/jevamivuvugi/fjfhjjf/optical_illusion_art_projects_middle_school.pdf
    • https://cdn.sqhk.co/busanurutar/W5Gif4C/winklevoss_twins_social_network_actors.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zilomit.epizy.com/why_is_my_roku_stick_not_working.pdf
    • https://uploads.strikinglycdn.com/files/19f63521-eb0c-4858-9e3b-3be80570f1a3/samsung_nu7100_55_price_philippines.pdf
    • https://uploads.strikinglycdn.com/files/ecf21887-527e-4abd-ae0d-b028eaff310b/parent_partners_plus_az.pdf
    • http://nibubatovavav.atwebpages.com/brother_prestige_30_sewing_machine_manual.pdf
    • https://uploads.strikinglycdn.com/files/5170aba5-4afd-46d6-907e-71acba7f0ed7/55683921235.pdf
    • https://uploads.strikinglycdn.com/files/0dcaac0f-57cc-4d8e-a5ce-5cf321a93b48/puwis.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_off0001432c.bin
29617c1d8de697cb6e583750fa2aefef32b471a803c6c7b5e4809acadbe6e407		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1432C 5208 bytes
font_01_sfnt_off000154d3.bin
3513ff9ef729c75e46171c63084ec3d2f32b414b4e11d09129bc453ddcb2634c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x154D3 11380 bytes

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