Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0e99082ed3dde73…

MALICIOUS

PDF

95.4 KB Created: 2021-02-21 06:20:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: dbc11f798b6abf5a354b8d93e2f3d533 SHA-1: 593f42d7697747a1e6d67abaa5064af48589f244 SHA-256: c0e99082ed3dde73bbcbc91dc5808ca791d77f4d40060ccf619d1009d2191191
156 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which are designed to mimic search results or download links. The primary URL, 'https://druttle.ru/wix?keyword=brave+new+world+audiobook+chapter+11', suggests a lure to trick users into visiting a potentially malicious site. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://druttle.ru/wix?keyword=brave+new+world+audiobook+chapter+11 PDF link annotation
    • http://tonorubur.22web.org/39017575359.pdfIn PDF document text
    • https://cdn.sqhk.co/govazilose/YjhcdLd/dipososopov.pdfIn PDF document text
    • https://wejerimaz.weebly.com/uploads/1/3/4/6/134648800/gopow.pdfIn PDF document text
    • https://nuzojumikosa.weebly.com/uploads/1/3/0/8/130814298/630474.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxowowi/egdgiKp/condado_puerto_rico_restaurants_breakfast.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/hia2Eig/ultimate_ninja_blazing_apk.pdfIn PDF document text
    • http://nelawetazabuta.66ghz.com/cot_sheets_for_baby_girl.pdfIn PDF document text
    • https://repawuwo.weebly.com/uploads/1/3/5/3/135313919/gopulubidep-vivifag-gidiropew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473379/normal_6013dff0c7658.pdfIn PDF document text
    • https://dojilosadokadog.weebly.com/uploads/1/3/4/8/134890500/1e33a7da6e3ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491169/normal_6016162e1d7d3.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://s3.amazonaws.com/rojalexipokadaz/mekame.pdfIn PDF document text
    • http://gerireg.epizy.com/vuxivujafofamefugutogiger.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/25008064953.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/jinja_create_template_from_string.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/ankusham_songs_naa.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/denuvurulu.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_off00012b64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B64 5320 bytes
SHA-256: 13de77fef71a6fa0d4be1c60c47d25f180f2f239aba824d302fc534ce70be66f
font_01_sfnt_off00013d82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D82 10700 bytes
SHA-256: f0594a8b814510c9165df2de5ad8bce29618d992f03fef7f6a27260d4ca47882
font_02_sfnt_off000161eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161EB 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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