Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff4a291fbb900ea1…

MALICIOUS

PDF

78.6 KB Created: 2021-05-23 16:14:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 40ec9f60732a6499edfcf9b4ef776682 SHA-1: ba0deecc8beaab176d2631c6fdf4d2d5ff24ce19 SHA-256: ff4a291fbb900ea1266f8c549758a9ae30ebc66b15f147cf31239830a95680e9
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URL leads to a suspicious domain, likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to malicious content.

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://lozipotod.ru/strik?utm_term=what+are+some+fun+facts+about+pyramids PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408720/normal_60311018e4d87.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463791/normal_60074648a3902.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/3de9e7d4-9b0d-47b2-81de-0c42dee483e9/43959605974.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dba3da3-3301-4e31-acd2-453b22ed9c68/why_do_my_legs_hurt_when_i_sleep_while_pregnant.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/logo_quiz_level_21_answers_iphone.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/9437585864.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fdbe92e-90ea-4d52-8078-4d9065aafe2f/60825198520.pdfIn PDF document text
    • https://s3.amazonaws.com/jokotaziweluge/gidobimetoles.pdfIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/73063616192.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae5b51e3-02a9-4629-8f1c-99ed33965d96/niranu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad7203a1-1395-4cff-8187-b7fffbfd289a/como_referenciar_autor_corporativo.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/john_paul_jackson_perfect_storm_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60d9b56b-e21f-4068-aa93-a296011e243e/noragibojanikukatofiku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f2950db-d46d-433e-84bb-2f97013dfc9e/13305166749.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/16898005068.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfe2c478-5105-4dae-94f7-0e851ade1515/oracin_a_san_judas_tadeo_para_los_casos_imposibles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72af92d2-b4a9-4d93-81cb-b6c8f5e821d5/verbal_reasoning_questions_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/what_type_of_oil_does_a_2015_toyota_sienna_take.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_off0000f612.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF612 5616 bytes
SHA-256: e302bc658b38e7a57e21ec5819940c4a6961629730ae72da4fa1bf6dfe685704
font_01_sfnt_off00010912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10912 10624 bytes
SHA-256: e57a19b9559ebf51a7142095ffc29766e96a10e7a618c10bcae410d3bf3425e2

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