Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eee75009f7c9fd5…

MALICIOUS

PDF

88.2 KB Created: 2020-11-30 21:59:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: caf11605d8d571d171264f95abb60daf SHA-1: 04863dd172b4d39b1ae933bd573cf01aa339d9af SHA-256: 3eee75009f7c9fd53b912d46a4adceb14758ca3026f2f03a77bd3274f49319e7
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and 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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=striction+bp+walmart In PDF document text
    • https://sefokasezasun.weebly.com/uploads/1/3/4/6/134690402/pafipanomubutel_pavanozi_xosidodog.pdfIn PDF document text
    • https://jufaxexave.weebly.com/uploads/1/3/0/7/130775513/13b897d65df.pdfIn PDF document text
    • https://jiwepurojal.weebly.com/uploads/1/3/0/7/130775762/2085477.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
    • https://static1.squarespace.com/static/5fc0c43aa87939686407a428/t/5fc26f0bf3de5e49b5b328bb/1606577942966/which_layer_of_soil_is_best_for_plant_growth.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e9eb3398ff75152e2002/t/5fc1798b5147b148046b2cf3/1606515084450/what_is_a_unitary_parliamentary_government.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe3146645712565404d180/1606299974908/98747184970.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/415d4392-1a89-4b12-9e09-a0bfce09070d/nitoremagejivi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0eda3ec917750a3d80aaa/t/5fc14526f81c9a2a0cd0c037/1606501672763/futosetesenizafo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0abc6bda9c57a97bd16fd/t/5fc36fe218e72e5fdb43db88/1606643683541/leginunapazodirilobinor.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf21a9d7936484053bb85/1606283802920/dialectical_journal_template_google_docs.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c362403f5353fd950a5e/t/5fc22c6c3570fb44d14bb79f/1606560876543/cape_disappointment_lighthouse_hike.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf6543f75b166439aa581/1606284885794/when_using_a_perpetual_inventory_system_the_journal_entry_to_record_the_cost_of_merchandise_sold_is.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2cae0c30a162e0c5ec24a/t/5fc4e8a2f81c9a2a0c3c740f/1606740131347/ex_officio_nomad_pants.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb506cae-6b5b-4ec8-805a-5ede32e518a4/1175473722.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c66b27a199023ab4af32/t/5fc137fbe6d49a06bbbe4317/1606498299887/20117196467.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF835 4904 bytes
SHA-256: cf710347ceec4410ec0bc05556a5f8d2be5498efce611844cef5efc3151e047d
font_01_sfnt_off000108bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108BC 12088 bytes
SHA-256: 69862d86deddb0a78f3c2fce539f151f86dc99a2e9ee812d537c5a641a3e302f
font_02_sfnt_off00012fd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FD6 16316 bytes
SHA-256: 8084185a6d0dd841e6a8e7f4618a18907baec685aee5eef808b3d5298eec42d3
font_03_sfnt_off00014565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14565 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f