Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8d1dbee6945e152…

MALICIOUS

PDF

39.9 KB Created: 2020-10-25 22:42:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 033fb6a1827f2f24b7b69a7a6f463193 SHA-1: dd500b763053108d722cccf621ad1bd506f725eb SHA-256: e8d1dbee6945e152c2244006d4f12335cd98f7dd10cb270dd4a96f2d1fd30a83
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ggtraff.ru/aws?keyword=geometria+descriptiva+aplicada+a+la+arquitectura+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369771/normal_5f904969bc020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374859/normal_5f8cb61fe87f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410020/normal_5f94405a1c15b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387411/normal_5f91fcabdb89a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/ribowexulo/46324900399.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/8569276086.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8879/6064/files/descargar_guardianes_de_la_galaxia_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8506/9477/files/3863391518.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7744/1438/files/negomilaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1406/1721/files/mccauley_propeller_installation_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9230/2752/files/kovovo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1819/0489/files/wemuxigugunevipolavo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9260/9686/files/girem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9342/5316/files/wake_county_register_of_deeds_books_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3977/1802/files/jusilaridodidigakomif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3739/1510/files/heat_stroke_management.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/75042764260.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/technical_analysis_explained_5th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/30364631034.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/paleo_diet_menu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8632/4936/files/what_does_vibe_mean_in_spanish.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5043/4211/files/zowowe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3481/8752/files/best_wallpapers_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/4699/3557/files/the_book_of_birthdays_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0607/3759/files/public_procurement_process_in_uganda.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_off00005b5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B5B 5516 bytes
SHA-256: ee4de0dc0f68672abc26fc7f3575a48c356d1e88ab92f0a96818bd039db1cade
font_01_sfnt_off00006e0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E0C 10888 bytes
SHA-256: ff8c2c7ed0aaab9491ce3fc05c8031b141e1237fa65c3d8c3fea4f3ae4667eb5

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