Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb8a4efecdc5be0d…

MALICIOUS

PDF

77.4 KB Created: 2020-12-25 03:46:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e0028ed47b6b610424c48fe7b7c392c9 SHA-1: 7c12e88447fcaeda84d3d68e2d391ac29fa92e23 SHA-256: eb8a4efecdc5be0dc21b00a5aa67766221f256c7b9088d458402ef9498950736
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to a URL that appears to be a lure for a game mod. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL and the nature of the lure suggest a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://gettraff.ru/strik?utm_term=blade+master+mini+action+rpg+game+mod+apk In PDF document text
    • https://cdn.sqhk.co/papusabefo/gggfshi/nomamedepulinubolatuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461509/normal_5fa8a594529e8.pdfIn PDF document text
    • https://cdn.sqhk.co/kitaparek/uidii8v/bricks_breaker_plus_hile_apk_indir.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/wilugugo/cantaloupe_island_trumpet_solo_transcription.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74f3317b-0e9e-498b-b614-751e911f88f5/bingo_game_template_ppt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2336be8-598f-4a4f-a047-fe6ca457b08e/zarulinifebekeliduze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/363ef9a2-f663-48d8-9db5-c3f8e62fb4e6/diy_gun_cabinet_lock.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/lubaradopigazepigubekuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/979b9f41-3488-4d77-89f1-a7a1972223fd/sheet_music_for_send_in_the_clowns.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cb70e1f-5e22-4b69-89ad-7530fb27da2e/vexapus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b38d2f5-6fc0-4db8-b437-6e8bd9cf3935/11026725523.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10570d4d-2f3c-4063-9440-81f8a045d42f/sharper_image_electronic_laser_tag_set.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
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1C7 5508 bytes
SHA-256: b4b1357bbaf97c170328ad13c219ead81a0fd59f2e47e694fcfcdf0eb57c1ddc
font_01_sfnt_off0000e46b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE46B 13912 bytes
SHA-256: 169639d07129a66be1b752a2a8d1500e43607a6e9190eedec376d6d0af49f740
font_02_sfnt_off00011183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11183 16164 bytes
SHA-256: 3f978f402de6e86033d02f27e00a24161d77beeda135494f046e3e613397910a

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