Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9a114c7de123168…

MALICIOUS

PDF

101.1 KB Created: 2021-03-20 13:16:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d270ca60de7150282336197e0b757a07 SHA-1: 1499286ac272c4f66fd5da637af8516555017150 SHA-256: e9a114c7de1231686a2f01efd1249cb3bbb27bfbc24524fffad48c07f4598142
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 0.9945

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://zajinet.ru/award?keyword=population+census+2020+nepal+pdf PDF link annotation
    • http://mitatizizuje.mypressonline.com/incrementalism_in_policy_making.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447095/normal_5fc5a391c16ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418391/normal_6047c9c0e8ebe.pdfIn PDF document text
    • http://legionmone.xyz/burger_king_crispy_chicken_sandwich_ingredientsv9eqb.pdfIn PDF document text
    • http://sevezor.scienceontheweb.net/64301948537.pdfIn PDF document text
    • http://bagesopabiwub.scienceontheweb.net/5109813087.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373261/normal_600f4d7c62d26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466379/normal_602a8a9fa4d41.pdfIn PDF document text
    • http://kenugizi.getenjoyment.net/xuwisezotebifufatopo.pdfIn PDF document text
    • http://rezisekuvaz.mypressonline.com/mappa_di_alicante.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419452/normal_5fd85b1e7b3d4.pdfIn PDF document text
    • http://pressit.space/8662435675hnulp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ladurabazidema.onlinewebshop.net/62737579259.pdfIn PDF document text
    • http://bekapoza.epizy.com/76757088371.pdfIn PDF document text
    • http://livirava.atwebpages.com/xonorosawiwo.pdfIn PDF document text
    • http://dijuvunote.onlinewebshop.net/retail_marketing_file_download.pdfIn PDF document text
    • http://sujimivotabis.rf.gd/vugolixitixofaj.pdfIn PDF document text
    • https://650c977b-0274-48a2-8498-43c0efc39f4e.filesusr.com/ugd/dbad32_d96989f97a3c41f3abeaea38befdd921.pdf?index=trueIn PDF document text
    • http://xeludum.rf.gd/50218261507.pdfIn PDF document text
    • https://ac685e6e-6442-44c0-91a1-b3a367e79ef2.filesusr.com/ugd/ce77c6_490e71f6bb164b4c9ddde85156446e32.pdf?index=trueIn PDF document text
    • http://luzadewo.epizy.com/fibujotolupukoguruja.pdfIn PDF document text
    • http://zonatitusajobo.onlinewebshop.net/nuxijisigidevafibiruk.pdfIn PDF document text
    • https://69df74eb-9f83-488d-97bb-abb55063df61.filesusr.com/ugd/f34323_19768303f67946e09aab13b8bd378638.pdf?index=trueIn PDF document text
    • https://19d8af67-ac20-4a7c-8ffd-69be953788a8.filesusr.com/ugd/578741_05fa9b62002f4acb9fb7abf40c6ad181.pdf?index=trueIn PDF document text
    • https://bb55feb6-a0c4-48ae-8f72-aea2c45912f8.filesusr.com/ugd/b9801a_43c3a747c35244f98147efda7d9d5813.pdf?index=trueIn PDF document text
    • http://pabotojixupi.atwebpages.com/sasaxer.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_off000129f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129F5 6340 bytes
SHA-256: 4778e010bbafd5ab790817236e0b7c00e9ab03743599b4de2518b12405ae44a9
font_01_sfnt_off00013fcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FCB 5328 bytes
SHA-256: 3191e12fb975a4a83e17e77dae0b66ce296653e36c4d45cc2ca1a027f45c42dd
font_02_sfnt_off00015201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15201 14936 bytes
SHA-256: c783fad02f22c39951d6c4b8768117074dcbd85e66ce6ce56aca418a6b5238b6

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