Malicious PDF — malware analysis report

Static analysis result for SHA-256 753738ad44bd772e…

MALICIOUS

PDF

66.6 KB Created: 2020-11-26 02:04:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 0e7ce3a2db2958831a66e6540637e81c SHA-1: 1496ec9bcc16095bab51edc2011c620b18c9925b SHA-256: 753738ad44bd772e4eea26c74967463bf02528451d57f449a0decb1f7a8028f9
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://ggtraff.ru/strik?utm_term=ffxiv+glamour+plates+explained In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370540/normal_5f8b822269507.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368238/normal_5fb483f0a6e94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407084/normal_5f969eb34e6f2.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/10ed02f2-199f-4d0f-bbf5-6d2c2521d146/starting_out_with_python_4th_edition_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wovigebi/demon_slayer_season_2_release.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/brussels_city_map_tourist.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b6c7949-75d6-4fb8-81b8-fef37b9fdc45/furikuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5affc3c3-a3ae-4de7-96c8-19aa54181008/dapezeketeduvupowosipoxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10607726-d444-4135-a90d-90f84f06f19f/jakude.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/39044174983.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/patoburutil.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/55344252320.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7f92037-ffd8-44aa-a1a5-f7cc81e4f43e/how_much_does_logisticare_pay_transportation_providers.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_off0000c75b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC75B 5444 bytes
SHA-256: 9770860ac51f9e736c2403009a1a62336fdf896ab98e14bd18f4c0427ad95d41
font_01_sfnt_off0000d9df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9DF 10692 bytes
SHA-256: be2850a225ccf996e17d03096cc20c7943069500b2fc3bef9fe5a4a8df4a3e76

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