Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb25d009b8e27385…

MALICIOUS

PDF

70.8 KB Created: 2020-11-22 16:50:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: aa4346558f1f384b9e0e9e936144d7d4 SHA-1: 966d2707c5e7a9c7a1e0ad7d3c44e5d95c7763f1 SHA-256: cb25d009b8e273857447bd9725fe6d8b449efa749fef96f0668c761ac247d4ce
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wb?keyword=instagram%20video%20online In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388614/normal_5fb7a01c6d509.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373271/normal_5f971c8612d80.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/2eb503fb-e02b-4ad0-b970-2e18c5ac5359/blue_link_anatomy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faad9846-49c9-4ac9-990f-346c165db672/89983241410.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fffbc4b7-a480-40dc-95dc-25106eb25bee/muverijazitadil.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/rekesizekesapoluvudip.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/savebamawa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a62013f9-3845-4e48-97bd-5a5ccedbb5e5/lidopakalumixopalidedado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c6a906e-105e-43a6-86e0-06bd26a1fa3f/armstrong_high_school_football.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cac3d82f-535f-4791-8b18-90ab221f8804/xumudupadopagu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51d30f0b-a7ff-4bee-a2f0-d52e1bccf031/ch2o_bond_angle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d8ac190-7cbf-4799-86a5-fa8ab7dae2b5/korizonepidatix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/328cc4e9-2104-4ddf-b9e3-2aa42d3ea077/agenda_escolar_2019_para_imprimir_fulanitos.pdfIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/game_templates_for_presentations.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_off0000d9a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A3 5144 bytes
SHA-256: d4e67abcf6cbe7552aa47c88223e327cc39e9accaf0865cb54560f5ff29dac25
font_01_sfnt_off0000eb13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB13 10280 bytes
SHA-256: 52fb6507ad9346f1e50027e7669cacee688ec6ca24ef9d0517547d874e00e1d9

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