Malicious PDF — malware analysis report

Static analysis result for SHA-256 fba87da0948f0407…

MALICIOUS

PDF

76.8 KB Created: 2021-03-25 18:12:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5f799adf688889822f26175c0d59bc8e SHA-1: c40795371b5ae0a28c79253b6751baa58116ef57 SHA-256: fba87da0948f04075366e05f5ebc81caf498091b9b7fd242b4f5573de67abb8d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://mezovuduw.ru/wix?keyword=a+raisin+in+the+sun+essay+topics PDF link annotation
    • http://olivamebel.com/152443531401n62b.pdfIn PDF document text
    • https://mijisurux.weebly.com/uploads/1/3/1/0/131070147/noloveleri-diworitokumasu-ligenodubavan.pdfIn PDF document text
    • http://dajobod.getenjoyment.net/job_application_format_file.pdfIn PDF document text
    • http://odemebayisitrafik.com/akshara_birthday_song3p1j9.pdfIn PDF document text
    • https://luzenage.weebly.com/uploads/1/3/4/3/134317967/7717637.pdfIn PDF document text
    • http://prognoz-football.club/juluwafusezofewu5qkin.pdfIn PDF document text
    • http://instapriz365.online/meals_on_wheels_castle_rockizm4e.pdfIn PDF document text
    • http://larebalin.mypressonline.com/mivavujitogutezopex.pdfIn PDF document text
    • https://legoxadev.weebly.com/uploads/1/3/2/3/132302888/d5873907.pdfIn PDF document text
    • http://lovelyhouse.online/makoxopukezixabuzukofxvf95.pdfIn PDF document text
    • http://garant-ritual.online/32339116852knhxh.pdfIn PDF document text
    • http://sale20.site/51110129654dmvw6.pdfIn PDF document text
    • https://nodifolosorak.weebly.com/uploads/1/3/4/7/134758422/tudugikividi_kobutebeniditux.pdfIn PDF document text
    • https://kuvolobogon.weebly.com/uploads/1/3/4/0/134012650/15776a6c4604a6.pdfIn PDF document text
    • https://banepopewux.weebly.com/uploads/1/3/4/2/134234854/fosomukujek.pdfIn PDF document text
    • http://copyrightviolationcenters.com/xebafebazilivafapafilujot4d74.pdfIn PDF document text
    • http://salestore.pro/fruit_cutting_knife1zc4p.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bogalibamadom.myartsonline.com/exercices_avec_comparatif_et_superlatif.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/pafogijuxikamulanadapegor.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/61023999123.pdfIn PDF document text
    • http://xufolat.atwebpages.com/longman_academic_reading_series_4_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/all_song_ringtone_punjabi.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/ssis_error_spreadsheet_is_full.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_off0000ed91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED91 5080 bytes
SHA-256: 0cef8b66e73e1c49bcdeb056bc7044eb065cfd15e338870bd91e66e421929e2a
font_01_sfnt_off0000fed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED6 11060 bytes
SHA-256: e99d647d3ebd45e3ece17aa4a4135c02203a6dd5186b8776896758801fbe6c3d

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