Malicious PDF — malware analysis report

Static analysis result for SHA-256 02b1d4f0289c5e22…

MALICIOUS

PDF

68.3 KB Created: 2020-12-17 21:56:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 0901d1275ef1df64a535a0fce3dfc6a7 SHA-1: c33f47a3b18dddc4c2f56d78534406c6bdd24549 SHA-256: 02b1d4f0289c5e22fc679c8b8aff9095461b8c034af3049ac4593b357964fd25
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body is heavily obfuscated and appears to contain metadata rather than user-facing content, suggesting its primary purpose is to host these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/aws?utm_term=laravel+blade+format+date In PDF document text
    • https://xarupome.weebly.com/uploads/1/3/4/4/134469096/jemukujidi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fffb114-2b4e-42b5-b11f-240b3d3398be/15403430649.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f384db48-568b-481e-92e9-f38c22c7406e/21751990644.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22edb5a2-a378-4e5a-93c3-4d9f8640928e/dexovidaxivubopilov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52c19fc0-bf1d-4d8a-964a-668ce927739c/xuloxamedekizekis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d11c074a-a14b-40de-8b96-1d6e10b3ba1f/8257024551.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae2c16cf-deb6-4b01-9506-25bae1811648/zureragobata.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e596e616-26a6-415d-bf14-651b8cc18cb0/1960_tan_gnmze_trkiye_tarihi_indir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1892b5fa-b5e6-4bec-9b88-14f88b3b24de/health_science_fundamentals_2_e.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bb8b49d-554d-4787-a052-eedc813711c6/16197903669.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afb192ac-7368-4a22-9781-cb1ea1d66de0/jabanigasogi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1049aac-15b3-4025-a50e-08020253636e/gta_4_gay_tony_cheat_codes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e762adbd-0d35-49ef-a571-c89b68b93ad1/54841807172.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_off0000cad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAD6 5016 bytes
SHA-256: b33d0438bba69c1b260c66682403aa74547fbec0111fb678f942b0b2cd008936
font_01_sfnt_off0000dbda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBDA 11812 bytes
SHA-256: 9be7930127422d408ab3e528dc7421c68f0449601b5ffb2417a5c50616699719

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