Malicious PDF — malware analysis report

Static analysis result for SHA-256 798505868e349d84…

MALICIOUS

PDF

74.1 KB Created: 2020-11-13 10:27:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 454b957d830dcd5fa005f3307bfb9790 SHA-1: d63c8c157fdb4f7a9e0819a466f6e6918bad89ad SHA-256: 798505868e349d84fc69dcb49d05e626490ca2bf71e86994aa64fc3b04db0685
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 0.9996

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://cctraff.ru/123?utm_term=sydney+brooke+simpson+net+worth In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374518/normal_5fa5f7f44bc94.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/dazemi/stop_think_act_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f175d552-bc2d-4f97-ba6d-ecbeb3d1b5f9/facebook_app_for_android_free_download_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a392ce8-9e8c-451e-bac2-f5c67a30337c/47753476651.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34010b30-13bf-4c24-836c-a26e7e62d37a/gifuxamawibuvavan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbcc3eab-3387-40ae-b396-4fd396f01a3b/minecraft_mermaid_mod_download.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/gold_gym_trainer_420_treadmill_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/692ed079-e979-46c9-8a97-754271e8d9fa/alamat_ng_pinya_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/sodoxi/computer_laboratory_rules_and_regulation.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/43220720264.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/931d12f5-cfe8-413f-9d2b-0b36486b5c69/rodaburajesejekimoru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8504d61c-a7eb-4754-8985-9bb7553af57b/76561905858.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09c8eed3-fa66-4d68-a89b-d2c642b63a7c/rawozobajabokof.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF33 5248 bytes
SHA-256: 98ab3d882f6504e2e611193e2d9c0dc92cc122f2050ac68fe7a2b8b345e52fea
font_01_sfnt_off0000e0dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DC 1584 bytes
SHA-256: 1f32d8e3da190ebc80818e3ddf3fdb330c62502198007c80d8e6a89b1d1ef088
font_02_sfnt_off0000e8e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E3 10664 bytes
SHA-256: 9f5eb04d8e1c19f8444f470a7688a1791d8933112d76f9fa3db9dc50093ec40b
font_03_sfnt_off00010d4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D4F 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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