Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeafd7a885cc14be…

MALICIOUS

PDF

87.5 KB Created: 2021-01-14 15:58:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 77e3ff8ea94d2e20764190f33c8ca6a6 SHA-1: 7743aaab2465a84f4320585dbbca0243c902df1e SHA-256: aeafd7a885cc14be11729f9c4105a80d11aec4af706246d2257d0fd92e4f352a
96 Risk Score

Malware Insights

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

The file is identified as malicious by a machine learning classifier and ClamAV, with the latter specifically flagging it as 'Pdf.Phishing.Trojan'. The embedded URL points to a suspicious domain, likely intended to host a phishing page or further malicious content. The document body, though heavily obfuscated, contains references that align with the lure of a 'monster hunter tabletop rpg'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffi.ru/123?utm_term=monster+hunter+tabletop+rpg PDF link annotation
    • https://site-1171522.mozfiles.com/files/1171522/world_of_dragon_nest_top_up_codashop.pdfIn PDF document text
    • https://site-1166680.mozfiles.com/files/1166680/63550857427.pdfIn PDF document text
    • https://cdn.sqhk.co/jefapukawore/dG01hbc/20244416447.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402722/normal_5f9b6b5b24133.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392871/normal_5f9dfa623d80c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422622/normal_5fae8b1b58747.pdfIn PDF document text
    • https://cdn.sqhk.co/fumamimed/hc7hfGO/48705183449.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489835/normal_5fe88a783e279.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366045/normal_5fff0ecf53a75.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/rujabepifar/31220815848.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/pathway_fistula_ani.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/henrico_general_district_court_case_information.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/doncaster_free_press_court_report_september_2019.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_off00011a5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A5F 5228 bytes
SHA-256: e54a2e480b50e36f3ec662346229cc10f71247a5501c9e605b615e1ae23d86db
font_01_sfnt_off00012c26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C26 10792 bytes
SHA-256: 1a91b8c054b5b824bedccabee69822e27e69b500cfd508cd40e883cb66365444

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