Malicious PDF — malware analysis report

Static analysis result for SHA-256 774beab41ab64508…

MALICIOUS

PDF

98.3 KB Created: 2021-02-24 14:53:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: aa5e7dd18e27539596ae97dcd961eda9 SHA-1: a65fd4463f173e1e644d05b82ab7b75cf1a3171d SHA-256: 774beab41ab64508c73b5debbc10c85aa1746c7c2e883f944134fd4c94b3d0ac
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically pointing to a domain associated with phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to a product search, aiming to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://bologen.ru/strik?utm_term=ryobi+4+cycle+trimmer+leaking+oil PDF link annotation
    • http://vunobugos.22web.org/aarambam_full_movie_single_part.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393763/normal_5fe64bab98712.pdfIn PDF document text
    • http://dimax-matrasy.ru/savewerewawalibamekulewml8ak.pdfIn PDF document text
    • http://beststudent.space/48450162839ion3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483097/normal_5feb34a35422b.pdfIn PDF document text
    • http://hookup681.site/python_language_in_urduldr1g.pdfIn PDF document text
    • http://viwaginuf.iblogger.org/dihybrid_cross_worksheet_answer_key_biology.pdfIn PDF document text
    • http://lefuduzitenazig.22web.org/29918139914.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489981/normal_6018dd59dd36b.pdfIn PDF document text
    • http://storeplus.info/12_snf_hitabet_kitab_cevaplar4pft6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470401/normal_60018e91a6cfe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496816/normal_60020f7e00a8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489598/normal_6026663c81b71.pdfIn PDF document text
    • http://makamar.xyz/nafegalojulamosotdf29y.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://xilijimerufosat.rf.gd/miura_boiler_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/mapbox_gl_styles.pdfIn PDF document text
    • https://s3.amazonaws.com/wujanozo/calculating_probability_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/befafuni/securus_video_visit_app.pdfIn PDF document text
    • http://fawepajemug.rf.gd/square_root_simplified_radical_form_calculator.pdfIn PDF document text
    • http://lozufoxozaniso.rf.gd/verb_to_have_worksheets_for_grade_1.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011dd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DD9 5132 bytes
SHA-256: 36183a2bcecaad4adcb789d2e5c1881f04bb2ca2f45f55e44c7ff085618b090a
font_01_sfnt_off00012f38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F38 11604 bytes
SHA-256: 5a42e498a7f86d9e4ebfde6e268cf9475dea05d6e1aa23da2e397438c0280aa8
font_02_sfnt_off000156ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156EA 16028 bytes
SHA-256: 0bae8649ba252bcfab81cb8324cfe1737d73e47191b507e117e6d0858e0066a8
font_03_sfnt_off00016b35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B35 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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