Malicious PDF — malware analysis report

Static analysis result for SHA-256 b89b287c0fb9fb95…

MALICIOUS

PDF

74.8 KB Created: 2020-12-21 07:08:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 9577fb2e3da6800aacd9f516e88ad481 SHA-1: 20da53dc789e7e869f9f4dcb095404b39b02bd0c SHA-256: b89b287c0fb9fb957db5b2c0861267d99d20d299f42f4b8e373d4064845a893d
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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/123?utm_term=supreme+court+case+study+5+worksheet+answers In PDF document text
    • https://jinuvavuvebox.weebly.com/uploads/1/3/4/6/134612635/8239188.pdfIn PDF document text
    • https://rozozejowetape.weebly.com/uploads/1/3/4/5/134510424/3163886.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/the_anunnaki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a3528c9-a5af-4d50-b689-60d42db17c76/virgin_mobile_assurance_wireless_customer_service_number.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/28579664256.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/fleetwood_mac_rhiannon_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/eyfs_learning_outcomes.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/metallica_creeping_death_guitar_tab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/366d378c-968e-4d03-a198-3b8a6c701a74/96568620807.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c212f1e9-8b44-4551-864f-3e7565f50863/5549579330.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b7df4a9-48ea-40e4-8c44-1ff53ede8306/30172226815.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14017811-1a7d-49b1-8857-54b86e0c8970/buena_high_school_sierra_vista_az_football_schedule.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/how_to_be_a_better_manager.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_off0000e861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE861 5768 bytes
SHA-256: 3f26f85fc9e8ab62614b198d21ad102d1c63cad55d4c795f9bc0ac7ccd60b8cf
font_01_sfnt_off0000fbf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF4 10156 bytes
SHA-256: 513ced2cd7ade59c8396f6f7a40b5a5a402df549a3c5629c645e949315032d02

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