Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dce9eb6f38c0f4a…

MALICIOUS

PDF

70.3 KB Created: 2021-06-07 05:04:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 5f60299aa713eba762158c143a4c81b1 SHA-1: 7155494cc35759211147be232afb88d89cdb8930 SHA-256: 8dce9eb6f38c0f4ad0c1c041481f59d6f4ded97ddf6184de6397df2b7ca4efcf
104 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 a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, contains a URL that appears to be a lure related to a 'free Minecraft' offer, aligning with common phishing tactics. The presence of an external URI points towards an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://coretry.ru/pbw?utm_term=can+you+still+claim+minecraft+windows+10+for+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4381766/normal_603b5ad220c47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367937/normal_605523494ea55.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454807/normal_5fffcf59957d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393346/normal_601ae321b3aaa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378170/normal_5fc89c4a12f0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426088/normal_603ccad5a67ff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394071/normal_60096566e6c8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481166/normal_5fdb88cfaeba3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379615/normal_605a28d94cfa4.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4455399/normal_60b7110ea4751.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/5be87a92-6a3f-4555-8948-d8861384815d/how_do_i_love_thee_meaning_brainly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d9f296a-e025-4667-8b0c-a50032738861/why_is_my_tv_screen_so_dim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/124f13df-e689-47fd-8646-1c7a61d88c02/50453503183.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c06043d-1a20-4fda-a1e1-68578eadc109/king_rising_2_wiki_chuck_greene.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49a0ce56-21f8-48c7-8911-1981a39900f8/best_shooter_games_for_chromebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/265eaf8c-4dbc-4b9e-8ec1-65ecf91ab8db/read_after_2_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/105bdab2-bd48-4836-9370-86007674a368/54094625354.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b242f405-c92b-446f-ac94-cf248e38c4d6/norma_astm_e8_en_espaol.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_off0000d51a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD51A 5460 bytes
SHA-256: 61cd3214535552fcd74b425af278249a7522c511f5296f744cf057f79bca3488
font_01_sfnt_off0000e7b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B1 10652 bytes
SHA-256: 1fda0ea62ac9c7c4537535900a98bfc488f094fa388e953cc6d243530597d164

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