Malicious PDF — malware analysis report

Static analysis result for SHA-256 64e9147c4cdc8015…

MALICIOUS

PDF

107.8 KB Created: 2021-01-31 21:19:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 2668812fe4b79c551591937ca225c3f1 SHA-1: 4613c772f82c6afcec7001399d3fa8a9b97adcd5 SHA-256: 64e9147c4cdc8015dccddca2b5178c90f08d432042e298486cca0946cec81b5e
96 Risk Score

Malware Insights

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

The file is a PDF document flagged as malicious by ML classifiers and ClamAV. It contains an embedded URL pointing to 'seumenha.ru', which is likely a phishing lure disguised as a software guide. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a malicious site, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/123?utm_term=oblivion+mod+guide+2017+pdf PDF link annotation
    • http://amaryllis.space/diy_3d_mask_free_patternnyv41.pdfIn PDF document text
    • http://salearea.pro/face_mask_for_toddler_patterntse4g.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465687/normal_5ff2405602ea4.pdfIn PDF document text
    • http://hesap-al-sat.com/my_little_baby_korean_drama_reviewn5e0h.pdfIn PDF document text
    • http://monoga.space/91556288518ttigs.pdfIn PDF document text
    • http://9gusevshop.website/exercicios_de_logica_matematica_com_respostas6m0ho.pdfIn PDF document text
    • http://ig-verifiedsbadge.com/galaxy_bowling_richmond_ky_hoursj6vjw.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/jivamubug/piverokazulowol.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/basic_piano_sheet_music_with_letters.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/airline_manager_3_apk_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/amman_kovil_kilakale_songs_isaimini.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/cerebriform_nevus_sebaceous.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_off00016996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16996 5512 bytes
SHA-256: c89361c415d2239c0393a11a68dd4575adcc80b49465e5b6b676d94474e271cf
font_01_sfnt_off00017c5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C5B 11136 bytes
SHA-256: e6ba0be78db63cd441cd523dccfbdc9e4cb5e873a59ccc6bb7f29c0c9656e4a1