Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc3d74e142da72fe…

MALICIOUS

PDF

46.4 KB Created: 2020-10-28 22:02:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 5250fe0274b35fdc63c0d8da3f812468 SHA-1: 2fca66da8c6c31e2f936a4d99f68ee6c92332d0b SHA-256: fc3d74e142da72fef0724de3bf906bbc366507f92b8812c3d2d53e06e89ca9ef
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=setlist+bruce+springsteen+hyde+park+2009 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369901/normal_5f87f36304c97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390330/normal_5f97cbe837163.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369766/normal_5f90e525075c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371790/normal_5f8c928290a31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374700/normal_5f89590990e51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370543/normal_5f8b0baeadfb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366335/normal_5f87e6277117d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370543/normal_5f8a638ba9e42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373526/normal_5f8b6b516e396.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366316/normal_5f871014f2ae5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373992/normal_5f8940250e314.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368971/normal_5f8ba00e3b8bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373505/normal_5f8af2edb9e6b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5f4bdda-42d1-43b9-9166-c56bc7cb9ff1/jazz_piano_bebop_licks.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3227/5865/files/28386198342.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5698/2937/files/aprilaire_model_550_installation_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7781/1358/files/weber_carburetor_32_36_mm_dgv_manual_choke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5566/7605/files/92_5_kg_to_lbs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/4517/4439/files/muzivasuzewipekumine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5747/0874/files/komagoximetase.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5b2e71d-9a68-48fe-acb1-55878dd0375e/gezolijekisupide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2180/2392/files/casio_privia_px-150_stand.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60b1d56b-1974-48ce-b593-6e719fe9f9a7/82600513900.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_off00006638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6638 3080 bytes
SHA-256: c27397356458df967e98ea0c4997ed2eab6a5e1e4fcabafdede38242691d1c63
font_01_sfnt_off0000713a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x713A 6172 bytes
SHA-256: 50e7bad19fec22a7052f05a0fda427198329306bda7985d42f37f8a3ed0918d9
font_02_sfnt_off00008627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8627 11040 bytes
SHA-256: b6a85309f443aca349d2b7e25b8d9f56e5df2439a89f971c2380411453080227

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