Malicious PDF — malware analysis report

Static analysis result for SHA-256 93308ce365f7f41b…

MALICIOUS

PDF

56.7 KB Created: 2020-08-14 03:44:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d4a1ad3bef08b051788d4a253cf9b846 SHA-1: b20863855abc25b09db4b6f2a8d6983e49e2c5f0 SHA-256: 93308ce365f7f41bb0c47e588fca93be2b796e35e07dfaf8c93480f920a3b470
154 Risk Score

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://ttraff.com/pify?keyword=oh+ho+bandeya+song In PDF document text
    • http://boxawada.geteffect.net/uploads/1/3/1/3/131378814/9224391.pdfIn PDF document text
    • http://files.kiwilearningcentre.com/uploads/1/3/2/6/132695356/2503968.pdfIn PDF document text
    • http://files.themakeupguy.net/uploads/1/3/1/6/131637656/8812074.pdfIn PDF document text
    • http://files.gowickedkettlecorn.com/uploads/1/3/0/8/130814340/4206779.pdfIn PDF document text
    • http://kunaxo.bestbuddieskennel.com/uploads/1/3/0/8/130814297/a6248115c044.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
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8722/4214/files/9738399834.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2986/4343/files/zarewo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73807437975.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7519/0422/files/25561154431.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4324/8533/files/53102177944.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2694/5947/files/business_law_today_9th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6289/4498/files/periodic_table_detailed_black_and_white.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/calo_plantar_tratamento.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1207/7206/files/doge_palace_venice_audio_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0308/3930/files/kovokeletede.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4347/1010/files/glossaire_des_termes_informatiques.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1960/6936/files/81605451095.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7077/4679/files/transformerless_power_supply_12v_1a.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000610f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x610F 4888 bytes
SHA-256: 2a1cb6d4a332ef334d340295fd35d1a0fd7f5b220f0f3a1c6cb1930c21ddc329
font_01_sfnt_off00007195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7195 15548 bytes
SHA-256: 8c81e66a5f1b9e20190ceab568e171d0db39a1e180322bf59e1798e279da31fb
font_02_sfnt_off0000a261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA261 16316 bytes
SHA-256: 28472a57270255ab3eaf7bfef4e500001c1fa3093b76db943ae929b3d5873736
font_03_sfnt_off0000b7f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7F1 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
font_04_sfnt_off0000c5f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5F2 3204 bytes
SHA-256: 6dc43fe83e6b264070569ca71927d3bef4a7368748c06359b1079d7f6b7fa7ba

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