Malicious PDF — malware analysis report

Static analysis result for SHA-256 058ed637fd610b64…

MALICIOUS

PDF

70.6 KB Created: 2020-11-24 06:53:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 78f3ef24cc907bcc580445929ba87f7f SHA-1: ed4dd10cc7f5af7c2521af07fd53dbf7b5694ce7 SHA-256: 058ed637fd610b641b5c48d01ea8131d3b115a2ddf33394dbe3ffaef64199058
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a critical detection score. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains keywords related to 'Monster Hunter World companions' and the authoring application 'wkhtmltopdf', suggesting a lure for users searching for game-related content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffe.ru/strik?utm_term=monster+hunter+world+companions PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4472200/normal_5faa49b8a3ee4.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/cf1ea1bf-8af0-47dd-8962-773c93dd7782/night_and_day_jacob_and_renesmee_movie_watch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c21b612-9b1c-4de2-a155-724f2a9ac00f/sezinowu.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/python_string_format_map_example.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/tamil_yogi_hd_movies_download_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/1486177943.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/759cf84b-22b0-4dc3-990b-ed23db63edf0/95457884929.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/bosemivajesafilageb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9359c062-68c7-4b3d-82ab-ccfaf61218d1/ejercicios_de_ortografia_con_solucio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/630171ed-a429-41ce-af8d-354fe7d5b1d1/modoriwekexexowiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09a3d4c3-0425-47a6-be10-2bdb2ce128fa/85453602621.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_off0000ca2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA2C 3440 bytes
SHA-256: b1548e95d9855e4a609e8ae47c76ca91e5b808593d5c3a1d0179b93714789512
font_01_sfnt_off0000d6a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A6 5412 bytes
SHA-256: c59e2275e1917cd953ba206c3d0fa2d63acb7864003adcea25b6e9d7af0f1f4a
font_02_sfnt_off0000e8fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8FB 10756 bytes
SHA-256: b90d29074a6897ef10a4e3e1c4bded9bf15822cd49b0de4d10c3dedf044f4bc8

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