Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ec9568ac936b2be…

MALICIOUS

PDF

54.5 KB Created: 2020-10-28 04:32:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 2be1c8b7502fac8dcf23d92a82e3a21f SHA-1: d1801bdba59c0ad07f99ac7dbd6dcadb1414106a SHA-256: 1ec9568ac936b2bec41b0569be17ac372b1351deceeef979d7c3c80a25b9005f
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://cctraff.ru/123?keyword=instagram+download+apk+old+version In PDF document text
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/sorak.pdfIn PDF document text
    • https://munazuzane.weebly.com/uploads/1/3/4/3/134350045/1539991.pdfIn PDF document text
    • https://wozuwonasanava.weebly.com/uploads/1/3/1/4/131483955/kuxozagem-jonuwoxubar-bomuzusirerefo-kusuvufik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366632/normal_5f877c7aeb9ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377115/normal_5f9236e9e038f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369935/normal_5f889b984de0b.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/2ffa2664-03cb-49e0-aeba-373ceb01102f/sifivomixadivituw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eac829de-99a7-4c0f-b2ff-37ace7016740/57463075125.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/3730/7292/files/slope_deflection_method_example_problems.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9802/1793/files/zidanuzabupaginoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/9366/0326/files/pak_tv_app_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2831/8877/files/wofowuvo.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/86428353244.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/ahistoricismo_definicion.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/legal_remedies_for_breach_of_contract.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/economically_weaker_section_form_in_hindi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/1860/2664/files/bivuja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2072/1565/files/chi_square_model_assumptions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5328/4008/files/horse_craft_download_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3543/3882/files/straighten_out_scanned.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6236/1753/files/buss_up_shut_recipe_without_ghee.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_off00008669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8669 5220 bytes
SHA-256: 3f22cc931a03a270884b650b4ddcca52b9e04f02eb947978f51f286979ac4332
font_01_sfnt_off0000981d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x981D 11280 bytes
SHA-256: 27ab4d261706cadee84453f39ed341126192310975e02b3c8dde2dc5c95d6038
font_02_sfnt_off0000be31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE31 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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