Malicious PDF — malware analysis report

Static analysis result for SHA-256 848e82797fac5268…

MALICIOUS

PDF

97.6 KB Created: 2021-03-18 06:28:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1258878e8463f670f0763c664683ef31 SHA-1: b0a24cfd94177fa874fe39c2813ebf35fd190b8a SHA-256: 848e82797fac5268b351f56d0d90c40a4c95d23b2f0cb01f62e6f0d83d78924b
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF 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 presence of an external URI suggests an attempt to redirect the user to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://botokaw.ru/123?utm_term=export+cheat+sheet+javascript PDF link annotation
    • http://bamasadukarudam.iblogger.org/uji_non_parametrik_mann_whitney.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490364/normal_601e111116e49.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408853/normal_5fe387657a2f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478398/normal_60362a1d76d54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394062/normal_5fe756b1b3216.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368219/normal_5fdc176f55767.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445118/normal_5ffb4ad6e7e04.pdfIn PDF document text
    • http://xedekozis.22web.org/26247295373.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479904/normal_5fd6ff98c0ca5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371261/normal_5ffece30ea42d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485149/normal_601a82718cc92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367297/normal_601db66273149.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404745/normal_6003cf49283f5.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/pilazi/maps_api_key_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2236de31-a10a-4c9b-a43d-ca32dda7cb06/what_is_pre_operative_nursing_care.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/71069572148.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43fadf0d-f744-473b-a495-3a82be1c7ca0/what_is_infinite_geometric_series.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/giminimofaxasodaxos.pdfIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/povivafanuto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/272452d4-b036-4fef-91fd-03f4226fc8d8/40738121596.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be77c6d7-ae32-4aaa-be2b-865fdb60f441/twilight_part_2_full_movie_in_hindi_download_480p.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/92969969221.pdfIn PDF document text
    • http://negavutagogo.epizy.com/42516103111.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000128d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128D1 5148 bytes
SHA-256: 5f75ea0fa20c73bd8298badba596ce02124f055ebff48b50b373cfde325a526b
font_01_sfnt_off00013a5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A5F 11984 bytes
SHA-256: 4dfb434f961c272c4aa5b21f8c17b58d92bec4ab6949c4588a53c08a28f057d4
font_02_sfnt_off00016378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16378 16344 bytes
SHA-256: ed45a24507f18daeaf6b6e9cac20235e9e43bed88bc2d44b7621eff085e31190

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