Malicious PDF — malware analysis report

Static analysis result for SHA-256 205f25feac63b9f6…

MALICIOUS

PDF

80.9 KB Created: 2021-02-26 02:57:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a090f3f848bd3c311832c26f6fc34298 SHA-1: b3757cf6b3408f29a8e8610171b585b540cc277f SHA-256: 205f25feac63b9f6c8d1c082a54c2b625e8ea84aea5c2ad42f32383d089d2573
154 Risk Score
Tags
free-cdn-ebook-manual-lure

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 'https://yafferge.ru/wix?keyword=looney+tunes+world+of+mayhem+apk+mod'. This indicates the document is designed to trick users into visiting a malicious site, likely for phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL itself is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://yafferge.ru/wix?keyword=looney+tunes+world+of+mayhem+apk+mod In PDF document text
    • http://urott-hu.com/559645189772110l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456705/normal_602c812d27184.pdfIn PDF document text
    • http://about-fb-support.com/photoshop_cs6_tutorials_for_beginnera5rc7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427086/normal_602a7b84ed0f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369187/normal_601f7e0824371.pdfIn PDF document text
    • http://detonicro.website/875333322804ldwi.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/gozifep/tajemovi.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/alien_vs_predator_game_pc_free.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/calculate_time_based_on_file_size.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/blue_cross_blue_shield_federal_reimbursement_form.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/fudofivudajajoj.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/cursos_de_ingles_en_linea_certificados.pdfIn PDF document text
    • https://s3.amazonaws.com/falejogajir/vexejozajur.pdfIn PDF document text
    • https://s3.amazonaws.com/bubisifapagefe/formation_anglais_paris_avis.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/71896125740.pdfIn PDF document text
    • https://s3.amazonaws.com/gekojulog/information_about_computer_engineering.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/nabojeradugejudewemefefe.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/99882131009.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/11745496612.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/rapid_typing_free.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/38804810996.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f42a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF42A 5480 bytes
SHA-256: e002aca68fe0b98e604cdf8adcddd78a318148d5e5fd05f21da75d41b2b8ac94
font_01_sfnt_off000106b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B5 4120 bytes
SHA-256: cbc6debff0269c508d00046b8dd62af0b712f76a2060d19096f49f5582573333
font_02_sfnt_off000111a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A5 10380 bytes
SHA-256: b51bc270c149d73a8f4fa78f590c5d9dfe647fbdda68e9e44d337b1c5cd96509

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