Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad72957c64482abd…

MALICIOUS

PDF

85.1 KB Created: 2021-05-14 19:03:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 86cbc14e72900155637b2a6cb396687a SHA-1: 6a47ab2003a6f3dd42ea047cd7cc79ab4bbb1a7f SHA-256: ad72957c64482abd5cc9010f5d497b92a6b9bc54c8347bf8319db13ed9280fad
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest it's designed to exploit users by presenting a seemingly innocuous topic to mask a malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://xajibur.ru/strik?utm_term=how+do+you+set+a+defiant+motion+security+light PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367961/normal_5fdae620c2eaa.pdfIn PDF document text
    • http://dokanusivodob.22web.org/85026556441.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491670/normal_5fdf180dac09d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463529/normal_5feed64e4648e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411250/normal_5fc9381b4257e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/dimobepesojuni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9053aeb-5904-44e4-98c3-d8aa28576522/oxford_english_dictionary_full_download.pdfIn PDF document text
    • https://9169454a-6e45-4b39-89c4-5cd9bf0a6084.filesusr.com/ugd/32fbc8_667e0835764c4010b448bb3c63786662.pdf?index=trueIn PDF document text
    • https://580b68e3-2104-4118-ae5b-4f285de1c062.filesusr.com/ugd/dad7b5_afd5326c9082407793bc9a06a463f570.pdf?index=trueIn PDF document text
    • http://temoweboriti.rf.gd/godiva_chocolate_box_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/83107593892.pdfIn PDF document text
    • http://sagibuwixuka.epizy.com/para_que_sirve_un_bosquejo_de_plan_de_vida.pdfIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/65361076303.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/mixoliwixumogopisozum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a6ff9db-82f1-481f-99e3-785508db741e/juzawodoboluxumeledo.pdfIn PDF document text
    • https://16564176-4c62-44d7-82e3-1dea6b832d73.filesusr.com/ugd/5e57cf_91e3a14ace3b4cf68e680dcea3fcdf6d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wanalovum/drama_triangle_worksheet.pdfIn PDF document text
    • https://6f8cb219-4830-455d-9ced-b55e65700e85.filesusr.com/ugd/fd30ac_62d5c925278e445e806c1016bd1a5451.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfa06310-0906-4f24-bd44-76997c5ae8fc/what_is_the_message_of_the_book_of_john.pdfIn PDF document text
    • http://zomosewilun.rf.gd/sony_mdr-zx330bt_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2edd81b-7cc8-4520-8d21-55fc947581e4/how_much_does_it_cost_to_fill_up_a_2008_honda_accord.pdfIn PDF document text
    • https://36ba0bd5-485c-4bd5-924f-6a5e18dcb854.filesusr.com/ugd/96419b_4664490fc2ee4d8196c5a311e644e4f6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/how_to_adjust_the_sights_on_a_taurus_pt111.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_off00010a1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A1B 5592 bytes
SHA-256: 3e75e0573a09267ec485095f151c845245ca83a99532f7e456be874dcea3a34a
font_01_sfnt_off00011d0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D0B 11620 bytes
SHA-256: 2f7df1dbfcaedfd9c4ad815f0be51987b02120e25e68bd518b8117fe12cf6055

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