Malicious PDF — malware analysis report

Static analysis result for SHA-256 0992c42044bb0e36…

MALICIOUS

PDF

40.1 KB Created: 2020-11-06 20:13:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e73cbeb7358245d5e6300a371557d6e8 SHA-1: 1fa94a78805641e92ce51c69f76d210d6dcad306 SHA-256: 0992c42044bb0e36b6bd57d0f6a0d4959d88d67980d4f2da52698f55ed9d0625
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://traffmen.ru/aws?keyword=words+start+with+ak In PDF document text
    • https://telavepifamika.weebly.com/uploads/1/3/4/3/134352802/lixapokoneb.pdfIn PDF document text
    • https://mumixopid.weebly.com/uploads/1/3/1/8/131872042/fopumudefixaka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379848/normal_5f91fc7208801.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371505/normal_5f93fb79637c4.pdfIn PDF document text
    • https://sonedolab.weebly.com/uploads/1/3/4/6/134630530/e973e2f581.pdfIn PDF document text
    • https://gadigode.weebly.com/uploads/1/3/2/6/132680949/8692159.pdfIn PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/de03b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391302/normal_5f9149ccec177.pdfIn PDF document text
    • https://jasazifo.weebly.com/uploads/1/3/1/4/131437377/gorozoj-jogolozefejon-nirigolatomob.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/zerejibixupav/how_to_recover_files_from_external_hard_drive_not_detected_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/clash_royale_hack_apk_no_root.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/download_new_movies_free_without_membership.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/wabigezitowizemaneke.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/track_and_field_uniforms_images.pdfIn PDF document text
    • https://s3.amazonaws.com/wisatutadi/72553435051.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/utah_department_of_natural_resources_jobs.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_off00005d0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D0F 5048 bytes
SHA-256: 3d71de95da0ed067603473fa60d018e528f830e7ad19f7463146e049e60e2064
font_01_sfnt_off00006e4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E4B 11244 bytes
SHA-256: c4c2dfad55c518353d9778fee23df8ebb0f30193cfe8e8cb9d7cee2a6adf629b

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