Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa91f292e5e2ba02…

MALICIOUS

PDF

35.1 KB Created: 2020-10-06 21:33:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: a64f81ec7b416e7e1049b000e02a3d3f SHA-1: 94fb3980a62c282f776f946a41c285a20e508b81 SHA-256: aa91f292e5e2ba02ada6b5a9121185f3147f4aa8191f8dcf9f7037fb25fe53bc
124 Risk Score

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=biblia+reina+valera+nuevo+testamento+pdf In PDF document text
    • https://site-1036811.mozfiles.com/files/1036811/wabavevobad.pdfIn PDF document text
    • https://site-1040050.mozfiles.com/files/1040050/welujipifeli.pdfIn PDF document text
    • https://site-1039892.mozfiles.com/files/1039892/86219345359.pdfIn PDF document text
    • https://site-1038561.mozfiles.com/files/1038561/85439573568.pdfIn PDF document text
    • https://site-1037129.mozfiles.com/files/1037129/23338619252.pdfIn PDF document text
    • https://site-1040041.mozfiles.com/files/1040041/90315142784.pdfIn PDF document text
    • https://site-1036874.mozfiles.com/files/1036874/vaseda.pdfIn PDF document text
    • https://site-1037188.mozfiles.com/files/1037188/35101136672.pdfIn PDF document text
    • http://files.miasings.com/uploads/1/3/1/0/131070476/lolabuvi_guluwevugoxoz_vunifapa.pdfIn PDF document text
    • http://todekate.whisperwindaussies.com/uploads/1/3/0/9/130969862/6177889.pdfIn PDF document text
    • http://files.bearlakecounty.info/uploads/1/3/2/7/132741475/zegusomol_xabifibora_mipej.pdfIn PDF document text
    • http://files.icctexas.org/uploads/1/3/1/4/131407148/jomawanebamifi-fegisu.pdfIn PDF document text
    • http://files.nataschahenderson.com/uploads/1/3/1/3/131380619/faa0873.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/1/0483/9093/0592/files/10745594976.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0305/1171/files/world_history_2_unit_1_study_guide.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_off0000490b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x490B 5436 bytes
SHA-256: 5897b9f5e19d58cb4df6d14086c9d78dc587848e528456915f4a6ef1995fd12d
font_01_sfnt_off00005b77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B77 10748 bytes
SHA-256: 878d0cd3075f0b825e93eb5747d1c075985ac7a37b8bded7052544d651cba455