Malicious PDF — malware analysis report

Static analysis result for SHA-256 5026d577a6bcce9d…

MALICIOUS

PDF

64.7 KB Created: 2020-12-25 11:41:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 9145b5bfe14042229ceeda97876ccee8 SHA-1: bf50e104c55a22dae848df13fcfe0e1d0a046a33 SHA-256: 5026d577a6bcce9d314894e47a5423b247bc1e45308034ba02197b6c7f96f210
76 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF document employs a social engineering tactic, presenting a lure to install a browser extension or update to view its content. This is a common method for distributing malware or stealing credentials. The embedded URL, https://traffset.ru/strik?utm_term=fidget+spinner+canada+cheap, likely serves as a redirect to a malicious payload or phishing page. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/strik?utm_term=fidget+spinner+canada+cheap PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420430/normal_5fae6a7dccd29.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409393/normal_5fcd3caec525b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420260/normal_5fdc32f832235.pdfIn PDF document text
    • https://cdn.sqhk.co/likafupat/Iibw4xA/25831831322.pdfIn PDF document text
    • https://cdn.sqhk.co/pekebugus/KkhbhjM/reaper_pickaxe_fortnite_code.pdfIn PDF document text
    • https://cdn.sqhk.co/zakikola/RQGbrG2/storyline_online_clark_the_shark.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455207/normal_5faa6386adfed.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/bd3d2efa-d89c-442f-9d55-de0682fd3e52/12743932168.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e9edfd3-3106-43e5-b97c-e50e5b063bdd/tiny_archers_download_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71227e48-656e-40e7-bb9a-fdca85879d43/romujajameputib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef225855-6122-422d-9866-35ed01f0709f/napudofajujul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aebbebc8-1add-4107-8804-f7be48069e68/36191639258.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3da2f3e-fdcd-41c1-8a78-6dd6073ff996/carpenter_ant_vs_termite_frass.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0f53ef4-d6db-4243-82bc-4fea24d30a18/gerirewuzemujaxifi.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_off0000bcd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCD2 5260 bytes
SHA-256: 85f67295307dee12a7ad669ba5c02267c51f1a0752365064d1f28a82a483cd97
font_01_sfnt_off0000ceb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEB6 11796 bytes
SHA-256: f57aa90cf7690c96f87e5d091b4f824d6ada5e301c50db8d6751cdf52d61a64b

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