Malicious PDF — malware analysis report

Static analysis result for SHA-256 18e503f2f6830d29…

MALICIOUS

PDF

82.0 KB Created: 2021-03-29 00:16:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a517bb2f9e4312d2fedd0396e61a16e8 SHA-1: 52d9e2a41193b15a867aefdec1446436769b56ad SHA-256: 18e503f2f6830d293ed366e8e61fa54a6209cc8a1112f581c31472810c5a0b6f
96 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 embeds external URLs that direct users to attacker-controlled resources. 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
  • 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://nipisod.ru/award?keyword=balance+of+payment+adjustment+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4425501/normal_5ffc010c4df84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448547/normal_603577ffa7b9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449172/normal_5fd70be776c69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482870/normal_6037408ceab54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449419/normal_602ab925c2409.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367642/normal_601b40b8c175b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498997/normal_601b188e43dc8.pdfIn PDF document text
    • http://naliputa.mywebcommunity.org/libro_de_metodologia_de_la_investigacion_2019_sampieri_3ra_edicion.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415930/normal_604ed2ee8b0da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472775/normal_60426d93c1906.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410988/normal_5ffdf800da3dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489853/normal_603fb7243d705.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://uploads.strikinglycdn.com/files/a9c08b9f-bcec-4b66-8734-80f6e5554214/program_philips_universal_remote_no_setup_button.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e3e3ece-7e20-4206-9ecd-924cef17cc0e/how_to_fax_brother_fax_575.pdfIn PDF document text
    • http://kuxoxokazutuv.myartsonline.com/is_elephant_hunting_legal_in_zimbabwe.pdfIn PDF document text
    • http://kimoviranonaf.onlinewebshop.net/navaxuregabo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e04e41eb-0572-480f-9ce6-f32dbeb21ec1/best_humminbird_fish_finder_for_ice_fishing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6b9dd6e-7b57-43d1-b3fe-99b69df2ab95/a_divine_revelation_of_hell_mary_k_baxter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/630dde21-b0a1-4d72-8f07-ace196586c7f/82229298007.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F7 5268 bytes
SHA-256: 3d5bc490c16aa57f46fae54bd5734d8fb55f4ad408fffae353ee78db4aace624
font_01_sfnt_off000106da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106DA 11064 bytes
SHA-256: e94ca584a38c92d9673705273458facaeec019fb7bee5cc0c5d711dd4be294a5
font_02_sfnt_off00012c9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C9C 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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