Malicious PDF — malware analysis report

Static analysis result for SHA-256 c461e8439a29017f…

MALICIOUS

PDF

80.2 KB Created: 2021-02-19 13:18:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1a4efe1a7cded0c899575bef9bcb6b8b SHA-1: fda85ebddd83a8367bbb40f14b746851f005a555 SHA-256: c461e8439a29017f31936f1bf79efcda3a7bb93e2e176f1b6d85a26942bf22f8
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URL that, when visited, likely leads to a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to appliance maintenance. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://druttle.ru/123?utm_term=how+to+descale+a+braun+tassimo+coffee+maker PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4392862/normal_600f3d1e95315.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366989/normal_5ffc8ffd64349.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500453/normal_5fc68b20a25b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394068/normal_602405c0d2c98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471488/normal_601814fe63a11.pdfIn PDF document text
    • https://cdn.sqhk.co/jefapukawore/zdieZii/nick_rivett_sports_shop_hove.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/sajatofubote/41087190991.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/tijoxivitefonisapap.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/29351953143.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/41220378862.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/fighter_plane_pc_games_free.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/41981712583.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/vomimolimuzufu.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/guided_imagery_script_for_test_anxiety.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/capitulo_1b-_3_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/bituxevonelamemekalupema.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/material_design_admin_template_github.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/total_column_google_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/base64_to_in_php.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/23113435474.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_off0000fcab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAB 5424 bytes
SHA-256: 5d8cbf21b6cc428476cf4d86f75348a621543e27840e2a79fa50cde9672775d9
font_01_sfnt_off00010f16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F16 10672 bytes
SHA-256: 33c6f1b91f85b55d0641525040b6468d2492496aadd534f3731ed50ccb450c9e

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