Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceb5c5f249615b0a…

MALICIOUS

PDF

68.6 KB Created: 2021-01-02 11:53:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: ecaef88d07c3bf9e70b07d830436ca8d SHA-1: 8b5b934cf9a2ca0df128de26961e8f1a774d0b93 SHA-256: ceb5c5f249615b0a018cab662adfd8949fa12600c2a0528bf1112fcb1bf466df
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, which is a strong indicator of phishing or malware distribution. The embedded URL is designed to masquerade as a legitimate document, likely to trick the user into clicking it. The ML classifier and ClamAV detection further support the malicious nature of this file.

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://traffking.ru/aws?utm_term=annual+performance+evaluation+report+form In PDF document text
    • https://cdn-cms.f-static.net/uploads/4392647/normal_5fbe1ef119c6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527237/normal_5fbb197a69c19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389571/normal_5fb2b0545d650.pdfIn PDF document text
    • https://cdn.sqhk.co/poxufape/erhiutl/ranker_tower_of_god.pdfIn PDF document text
    • https://cdn.sqhk.co/dadakafopina/jjgdghv/neweveruxavakujemusinib.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417032/normal_5fefa23fb4994.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/buponuwebi/56832914338.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/how_to_write_an_opposition_to_a_motion.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/99635041567.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a68d1955-64e0-4ccb-95e8-7d69a6ecf878/rocket_league_unblocked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5f24795-2ded-4b18-bf90-80f16e824572/1942_mobile_1._00._10_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5838dde-dcf4-4ba8-a5ac-d218af241e11/79137111588.pdfIn PDF document text
    • https://s3.amazonaws.com/suzeduselu/que_es_un_estandar_de_belleza.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/hedwig_s_theme_sheet_music_trombone.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_off0000d1cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1CB 5032 bytes
SHA-256: 8b205488bbd539469b17b4114034b4bb649d60a6f8b491d8a0ad69430daf5772
font_01_sfnt_off0000e2e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E1 10472 bytes
SHA-256: 73edd9f10ad646e72a3f9c84389488528511370f0bde917f46556edf9bede2e1

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