Malicious PDF — malware analysis report

Static analysis result for SHA-256 de99457aca452edb…

MALICIOUS

PDF

66.5 KB Created: 2020-11-29 05:43:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: d7d290d7a41becc765b7304ec0491ed8 SHA-1: 26fbd3337188ced95beffbece39c8421b476a685 SHA-256: de99457aca452edbe898672b9e29b2e562e23e4d644d6ee8e6b93909dece3fa7
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-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://gettraff.ru/strik?utm_term=tn+report+card+for+child+care+centers In PDF document text
    • https://wegupufula.weebly.com/uploads/1/3/0/8/130813429/fidif_wafomekoxije_fevopezola.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382405/normal_5f96646251b49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402533/normal_5f9475fd3f029.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457570/normal_5fa5e1d233f31.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/40ddfa4d7f4e3e.pdfIn PDF document text
    • https://geregilewupune.weebly.com/uploads/1/3/4/8/134849809/logagow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424331/normal_5fbecf0ac4780.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367279/normal_5f8818d9795c5.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/017f0c58-dc0d-470d-a810-ea2ade8e8f72/worafafaku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1c342de-742a-4667-bc7c-969365be2202/famokelidepus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8911d35d-d2bd-4017-bfd0-c7b21ef867b7/the_pigman_summary_chapter_8.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adea6e7c-704f-43c1-a0b3-167765a23f25/ridogelufajeku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f959f5f3-9eb2-4556-b5bb-c032a9b3cefe/golazeripesilawijitilek.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_off0000c8a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8A1 5192 bytes
SHA-256: 67571d69402cfc0b6fff342131fa99eea76ec5fb729d42d6ab36d2f61b7ec6c7
font_01_sfnt_off0000da44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA44 10364 bytes
SHA-256: 68a2a2f7d7417b16c9763432e83a603925a42d6105c23809d3f128d30a687f26

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