Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd3b5b655d4a054c…

MALICIOUS

PDF

84.2 KB Created: 2021-02-03 11:02:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: de3a7338c76db56ed9ba1994287af2e4 SHA-1: bee644c8ff561461ef317bad010525df580f2df6 SHA-256: cd3b5b655d4a054cbb4a6b5b22304f1c6d51dd0a86a3ff3139927468cb01c6d6
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains embedded URLs pointing to potentially malicious domains, suggesting a phishing or malware distribution attempt. The presence of PDF-specific heuristics further supports its classification as a malicious PDF.

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://jacksth.ru/123?utm_term=serge+lang+analysis+pdf PDF link annotation
    • http://healthytrands.com/linear_pair_geometry_definitionbcoj3.pdfIn PDF document text
    • http://edaruzal.xyz/5055966787223ao8.pdfIn PDF document text
    • http://nasevozowu.22web.org/case_files_pediatrics_5th_edition.pdfIn PDF document text
    • http://adminhalil.com/manga_rock_premium_apk_3.7.1lstf8.pdfIn PDF document text
    • http://cocobuka3.xyz/unlimited_vpn_premium_apkr3mdj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424010/normal_5fe2db19c6f5a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485149/normal_5fdd86c3f3448.pdfIn PDF document text
    • https://cdn.sqhk.co/dorusafe/ohargha/xopader.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://gekabogaramal.rf.gd/modified_proctor_compaction_test_report.pdfIn PDF document text
    • http://zenerunikojovo.epizy.com/z_bitmap_brothers_windows_7.pdfIn PDF document text
    • http://gajubadizoduj.epizy.com/34676328909.pdfIn PDF document text
    • https://s3.amazonaws.com/nefunupu/38005315019.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/96537361488.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/mivimozedivujawetugu.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/13077902506.pdfIn PDF document text
    • http://fomobiwudaz.rf.gd/76414500945.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_off0000fe61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE61 5012 bytes
SHA-256: 6b36988da1cea12c0cba5c7fffac626f87cbffdfdfeaff472edc19daf2289528
font_01_sfnt_off00010f6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F6D 11244 bytes
SHA-256: c66a69f0a1de0b8bb4d5aca28edf2ead229020e2206a95ab8490e265e622da04
font_02_sfnt_off00013481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13481 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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