Malicious PDF — malware analysis report

Static analysis result for SHA-256 57df4ce2700b0da4…

MALICIOUS

PDF

69.6 KB Created: 2021-02-28 20:04:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 0a94eca783b8d10cb3c48cbd248c7361 SHA-1: e1194668db2b36ed583fd9d19a2a4a09bce40d8b SHA-256: 57df4ce2700b0da4b3518b6b2fd3ff971e657a0f61b8a2a5bdb2a9a8043baa34
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://yafferge.ru/123?utm_term=paintball+gear+near+me In PDF document text
    • http://janexik.22web.org/triangle_classification_worksheet.pdfIn PDF document text
    • http://sluzhba1.net/zokekefagivetbqzw8.pdfIn PDF document text
    • http://nigavereke.mygamesonline.org/zuparidosoxi.pdfIn PDF document text
    • http://giocodigital.fun/30198644183r0yn4.pdfIn PDF document text
    • http://drovazvenigorod.ru/fupiboragimexipefiduvomog478a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369773/normal_600b718e53dd8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450045/normal_5fe0ddc165372.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369190/normal_602a4039cceec.pdfIn PDF document text
    • http://wonnaturila.space/google_chrome_browser_old_version_apks9vbw.pdfIn PDF document text
    • http://bestgirl69.com/international_migration_report_2013u0v8w.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425929/normal_6022da101556f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xavuguwibimovin.epizy.com/81885445190.pdfIn PDF document text
    • http://nejarisiwudu.atwebpages.com/agatha_christie_books_collection_uk.pdfIn PDF document text
    • http://tinipukax.epizy.com/smoothie_recipes_with_yogurt_and_milk.pdfIn PDF document text
    • http://wowimiberosodav.epizy.com/47368099753.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_off0000d343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD343 4968 bytes
SHA-256: 49c3ef45f2f78da71b01afb1802e7ecd3a899394c674b462e2196671c4c76ca1
font_01_sfnt_off0000e419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE419 10968 bytes
SHA-256: c097ce0b7abccd2dd35ce9bcc934fa0934be0a4ac67c10d4431639bebf0805df