Malicious PDF — malware analysis report

Static analysis result for SHA-256 4114915048b89b6c…

MALICIOUS

PDF

63.6 KB Created: 2020-12-05 13:39:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 69cb9d3fe62e9af0d979c9bd11c7a975 SHA-1: 82ba3c710d4eeefc4083617ddc1b61eaf3cb097f SHA-256: 4114915048b89b6ccfebc289f928779ff871522c73d91043db8a8304ca5fed03
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 link to a known malicious redirector, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although the document body is heavily obfuscated, the presence of a malicious URL is a high-confidence indicator of an attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://cctraff.ru/strik?utm_term=witchery+vampire+ritual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4373004/normal_5fc329665f793.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387430/normal_5f95e0860ab0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417039/normal_5fb75c6241f4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409609/normal_5f9cdb8922b06.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc18f8d0a2757459be7919f/t/5fc38838173fb5383b10adee/1606649913176/jobefivaxujajalilasawe.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc532d4a13a450bab107905/t/5fc9379c6c7fbc0768b3dbe2/1607022492640/rilugelik.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdee77173fb5383b66f56b/1606282872646/svs_pb12-nsd_amazon.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1b82e11f6a419848b6c75/t/5fc346044f983757204935ed/1606632965233/94087367515.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/mcent_browser_recharge_browser_apk_app.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd1cbd61a76734b5ab73c2/1606229183206/photoshop_stroke_path.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f1dfe9fc3622d5225d5f/t/5fc3258c3c02f22b9d741f8b/1606624652937/dog_barks_in_crate_when_alone.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/mazibekekebezewiriwozate.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/coleman_powermate_2500_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/sans_serif_block_font.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_off0000bcea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCEA 5168 bytes
SHA-256: 6977af8cc31d0b0ec43ddf8b0033fd69e1fa6c72d2c7bb0623a25fb6d6d6f524
font_01_sfnt_off0000ce6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE6D 10324 bytes
SHA-256: 581658d74cda0fbdf3664d349feb48cbf7dfe856e932ca33c0b24c38df4217f2

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