Malicious PDF — malware analysis report

Static analysis result for SHA-256 03de35f2a1cbde9d…

MALICIOUS

PDF

72.3 KB Created: 2021-03-06 01:40:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: af6c51e473803d8b9f3628fd98753975 SHA-1: 32550c7dd5a97993ff065ccef453ab855c84fa31 SHA-256: 03de35f2a1cbde9dc9c63a85ce293053957005c0ce78decd2f62ec7a9f3e2ed5
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dafemum.ru/wix?keyword=sketchup+layers+not+showing In PDF document text
    • https://static.s123-cdn-static.com/uploads/4415944/normal_5ffd014385113.pdfIn PDF document text
    • http://nemugub.mywebcommunity.org/newidabibif.pdfIn PDF document text
    • http://dazolovegom.mygamesonline.org/universal_remote_for_magnavox_dvd_vcr_combo.pdfIn PDF document text
    • https://cdn.sqhk.co/podoxato/tidwhjM/xuvija.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483388/normal_6007f441403e7.pdfIn PDF document text
    • https://cdn.sqhk.co/tufuboloruj/uE2gjgd/golf_clash_golden_shot_cursed_swamp_hard.pdfIn PDF document text
    • http://kalukawuwo.mygamesonline.org/h20_mop_x5_replacement_pads_australia.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wudokuzogikozu.rf.gd/alora_sally_song.pdfIn PDF document text
    • http://rowomasogig.epizy.com/97011880502.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf5f23c2-fa2e-468b-b653-5d78783e755e/zudobo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae1cfb58-ddbb-4f8b-bdcf-8e42d8c08cfa/29041489282.pdfIn PDF document text
    • https://78fa80b2-8629-447b-ad63-53e91e8d4948.filesusr.com/ugd/8f02de_a0d76a3680cb4d24a0f84e79cc87a0b6.pdf?index=trueIn PDF document text
    • https://11f44e1d-c86f-4be6-baa1-90970e7c24f5.filesusr.com/ugd/a298ce_2a9a9cf001664e49afab5ee57fe65609.pdf?index=trueIn PDF document text
    • http://gubezerasowig.rf.gd/funciones_trigonometricas_tangente_al_cuadrado.pdfIn PDF document text
    • http://lunofalogejutu.epizy.com/ielts_writing_criteria_task_1.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD4A 5556 bytes
SHA-256: dcdf2d7e13dfe256a2cdf3a8ea11c554565399ece71d3ec318697eb70b2bd3e0
font_01_sfnt_off0000f04a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04A 10776 bytes
SHA-256: 8332c4f4b26fb0bed04c059264d82f91dd6a3ebf45b993efb32481b82648e1e7