Malicious PDF — malware analysis report

Static analysis result for SHA-256 b24478d9600f115c…

MALICIOUS

PDF

70.4 KB Created: 2020-12-03 23:14:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8325d6f551eaf75066b5855ae9beed9e SHA-1: d73c519241b93ee7dcb56be8c4a5f52addbd6e62 SHA-256: b24478d9600f115c196dfa95333f32e34d5fc93a200fd67940803c87a07a60ca
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 0.9997

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://traffmen.ru/aws?utm_term=angry+bird+2+mod+apk+obb In PDF document text
    • https://cdn-cms.f-static.net/uploads/4481422/normal_5fb2ebae22173.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391896/normal_5faa128c6a1ad.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/13070508-9fbc-4633-b6fb-c9b86b4af305/where_can_i_download_too_wong_foo_thanks_for_everything_online_for_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/ballers_season_6_episode_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc66350b-4072-43ab-ba83-a00a52a5dbde/dg_customer_first_survey_to_win.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d463875b-ce57-40d5-a80e-a475460becd2/77361026563.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd03cf72f8b574a0f45391/1606222800972/furivobapofujunumuvo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4f2670a2757459bfcd987/t/5fc7dc8de47f8a7099839b98/1606933650533/sas_zombie_assault_4_hack_download_ios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a900183b-2f75-4244-af4b-ef6787078309/titanic_pelicula_completa_en_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/dolezutet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a9a2531-5bda-4d40-96ca-dabe9601b00d/juegos_de_agilidad_mental_para_impri.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_off0000d64a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD64A 5496 bytes
SHA-256: e31a825069a091556f1fe14272fc82a55516ba87f91a61a01be89394b018cbc9
font_01_sfnt_off0000e8f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F5 10816 bytes
SHA-256: 6d96689b373b618d420bfd0728c947d53d467e6dbde1f4934cd8d9ca76d65ab3

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