Malicious PDF — malware analysis report

Static analysis result for SHA-256 41f71fbe15783d74…

MALICIOUS

PDF

76.7 KB Created: 2021-05-17 23:53:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: fa723cbca226c0dce47df5556e2d00a1 SHA-1: 4b6c2a08bb21126dc0b9d8d92a881add22bf6f02 SHA-256: 41f71fbe15783d7415c2d1857615b8638dac86f630c65254d5ff47a83b8db198
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains an embedded URI pointing to a suspicious domain, identified by ClamAV as a phishing trojan. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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://pelibifir.ru/strik?utm_term=the+kissing+booth+3+book+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4372376/normal_5ff4c7c95e6a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415321/normal_605135d463b63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476420/normal_600a53f0a3e89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497358/normal_604eb8d32e890.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366662/normal_6048c81737a85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393779/normal_6043ccc7462be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447251/normal_605d6efd2ec83.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/9fa6b35e-7d42-416a-ab59-22a04f64d94e/snow_white_and_the_huntsman_2016_full_movie_in_hindi_filmyzilla.pdfIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/anne_of_green_gables_file.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95621a5d-08fb-4e26-b538-52708e0d3b55/dirujebaf.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/92712352992.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dff96b4c-202d-4340-b6e6-ef9548c83b9b/ron_paulk_workbench_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e603ad77-86ac-4f62-8163-fbfcf8d8f534/96452668203.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44a454f0-bdf2-4fab-b933-0f1dca3a265f/2010_camaro_2ss_convertible_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6233c62-21b8-47e2-893f-085e4e62b6d8/kobewivejelomasiweka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/353734fd-56e8-4a38-b99c-a2a487ac110f/43064935222.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef439dbc-caab-4a25-affa-db1e67e5f2e2/nawepuxawaxadu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cb0df9a-f042-4a4a-afb6-3d380bf4f136/84571066272.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77fd454d-478f-4b98-9f47-c369922c6612/how_to_use_intex_saltwater_pool_pump.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2f53a37-eb79-4413-bccd-e1cc8d80bb51/how_to_diagnose_car_ac_system.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/28948468738.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d41bdb98-a94e-4714-a110-c02bb7511844/fatiwaziwarodiketure.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_off0000eda6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA6 5280 bytes
SHA-256: 453c1e3f37dd8305918468e7fb57358ddfa70b2f4647cd5e89e4376bf97aa5bd
font_01_sfnt_off0000ff9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF9E 11192 bytes
SHA-256: 39e9e2bf0c69f5354d716699e5bb8beff46c0d087abadedc687c7a344e2de23d

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