Malicious PDF — malware analysis report

Static analysis result for SHA-256 80dc0e2a8f8e30f6…

MALICIOUS

PDF

61.6 KB Created: 2021-02-17 10:20:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 902f3be22d2a0a4aba290cf66259308a SHA-1: aabf181fa78a5a4bbd8ffba30c70d17dbf560d04 SHA-256: 80dc0e2a8f8e30f6c20dba12b6f1d7a45b283f6b753c73c7ce3326d8e19ab61d
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by 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 0.9997

Heuristics 4

  • 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://baarspo.ru/strik?utm_term=how+to+cook+lamb+rack+slow+cooker PDF link annotation
    • http://hristogrigorov.com/red_hat_ansible_documentationl02h9.pdfIn PDF document text
    • http://daduriwikoniza.22web.org/zologe.pdfIn PDF document text
    • http://ebay-coupon.ru/arabalar_3_oyunu_apk_indird9965.pdfIn PDF document text
    • http://reduslimitaly.website/gotebexebbehu.pdfIn PDF document text
    • https://cdn.sqhk.co/xojelumegasi/JC2hhjd/.pdfIn PDF document text
    • http://beautysale.site/cb_insights_fintech_250cxhq0.pdfIn PDF document text
    • http://podipotekoi.ru/essay_writing_topics_in_english_with_answerspgf7o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409095/normal_601b30f36e774.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefima/hoJFxyE/pixabugov.pdfIn PDF document text
    • http://fortysgjdk.fun/top_stock_android_wallpapers_2ocz69.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://namavorudil.epizy.com/lavadoseg.pdfIn PDF document text
    • http://fekerudosepu.rf.gd/sincronizzare_whatsapp_rubrica_android.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/1328253015.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/employee_performance_appraisal_example.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/tidaxazawawofinaroselu.pdfIn PDF document text
    • http://zobemodorujo.rf.gd/methane_carbon_dioxide_reforming.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_off0000b4af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4AF 5200 bytes
SHA-256: 452fec4ebf6d32ed2deb2925c09ba7dfc1855a8ed4785d81b73a24f28cb38dc2
font_01_sfnt_off0000c659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC659 10988 bytes
SHA-256: 3d92167b373b7719a4f472fa889c67c60d3409213b8549217393785b96ddfb58

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