Malicious PDF — malware analysis report

Static analysis result for SHA-256 8700e911a2335890…

MALICIOUS

PDF

80.3 KB Created: 2021-03-29 18:40:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 3903bcdb62ecb1b9a14ea8718c56e02d SHA-1: c8e2d152f285622e0f2e3ceaa266bb9c6ad7c624 SHA-256: 8700e911a233589002b8373e2072963cc7519550ad62a153845a8f3a02eb6595
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 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/wix?keyword=10+is+again+unblocked PDF link annotation
    • http://lugirepapirizo.scienceontheweb.net/banking_awareness_books_by_arihant_publication.pdfIn PDF document text
    • http://xuwuvewisin.mypressonline.com/kofebifu.pdfIn PDF document text
    • http://lonemap.medianewsonline.com/atal_pension_yojana_application_form_sbi.pdfIn PDF document text
    • https://guxesawaxogego.weebly.com/uploads/1/3/4/3/134314991/bugefori.pdfIn PDF document text
    • https://xojakonokixamu.weebly.com/uploads/1/3/1/1/131164577/loribiruvumala.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454179/normal_5fc891967b7c6.pdfIn PDF document text
    • https://widuboxizivibib.weebly.com/uploads/1/3/4/3/134315701/4266902.pdfIn PDF document text
    • https://kuledeju.weebly.com/uploads/1/3/0/7/130775905/tetow-vejeve-lerasuz-tazokavegejo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406497/normal_6038451532f77.pdfIn PDF document text
    • https://fasorijaj.weebly.com/uploads/1/3/4/5/134501708/9330822.pdfIn PDF document text
    • https://wudajelenap.weebly.com/uploads/1/3/4/4/134470879/520cea121.pdfIn PDF document text
    • https://memuvarava.weebly.com/uploads/1/3/1/3/131384606/gututenowuxumakeson.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
    • https://uploads.strikinglycdn.com/files/0b675fbd-f5d7-4dd5-a82f-acc796005eac/ketiribadotumuxuxe.pdfIn PDF document text
    • http://lavapokapajemob.myartsonline.com/storytelling_livro.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/relative_clauses_lesson_year_5.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/vertical_id_card_template_psd_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nefagolom/92845808893.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4b40e81-a6ed-4c4f-995e-5e91916624bf/fruity_loops_free_download_full_version_for_windows_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b850d43-5ac1-446a-a268-f891d231e7eb/download_sanyo_tv_remote_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f090ba40-9e50-4811-91f9-db50980d048b/30871153314.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f62b44cc-5db2-4df7-884c-bcaab08798e3/drz400sm_service_schedule.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/elasticsearch_aggregation_format.pdfIn PDF document text
    • https://s3.amazonaws.com/xowasosuf/dashboard_templates_excel_free.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_off0000f10b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF10B 5116 bytes
SHA-256: e1f96fffc3c06468b0a25b32c0538c10e789d2f9db57299cea8bf3315870853b
font_01_sfnt_off0001026b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1026B 10336 bytes
SHA-256: 00e598d0b96c9b1048fc4f03eec86dffbceb2b16263b9beaf56b84eecf3d4211
font_02_sfnt_off000125c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125C6 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333