Malicious PDF — malware analysis report

Static analysis result for SHA-256 68cddb6fd18230f7…

MALICIOUS

PDF

42.8 KB Created: 2020-10-30 16:33:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 04d176c4abfd9e200063a92925a6285a SHA-1: d8fa91d66d9ae9e5912ba5293625c55afcbf4287 SHA-256: 68cddb6fd18230f7f254ec5f55439ad923ef4e58dec20a2fb8caa63b33cb03a5
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/strik?keyword=cargo+bridge+2+hacked+unblocked In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368485/normal_5f978a2bd19d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412403/normal_5f99b1a900b3a.pdfIn PDF document text
    • https://bajusumuke.weebly.com/uploads/1/3/2/7/132741128/9487993.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387571/normal_5f8d109a10ab3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379045/normal_5f9618bf4f313.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9821/7378/files/incomplete_dominance_codominance_definition_biology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/706c8414-eb82-4bfa-b0ec-1629e884feda/30643822093.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/dragon_ball_z_bulma_voice_actor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e21b6d0d-95ac-48ae-9ba1-3666b7b6d746/49708603243.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/4410/7950/files/dovug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5510c21a-009b-4712-a2ca-2813ddda6b5c/vujiwobexexoli.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/peer_review_worksheet_college.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_off00006692.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6692 5264 bytes
SHA-256: 7b156d6bf7002fbf5af172dc945bc53dd87d809a1a47ace822af8539a58429d3
font_01_sfnt_off0000786b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x786B 11288 bytes
SHA-256: f351ddbda3c7166d1a57a6acaa33317fa1731f541564437924ab31400cb7af48

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