Malicious PDF — malware analysis report

Static analysis result for SHA-256 86ff3d0bf5609c09…

MALICIOUS

PDF

73.1 KB Created: 2021-02-26 21:46:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 0f3c00572df597370bae5b0b27cd4c2c SHA-1: 6e81bfe286bb606daea79464aa48a6f32e78dace SHA-256: 86ff3d0bf5609c0953a9be3c864475e8929e00b855539894954c9bf8ce2c4f8f
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dafemum.ru/wix?keyword=emily+gray+tedrowe In PDF document text
    • https://cdn-cms.f-static.net/uploads/4476140/normal_6010e92fddd1e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392868/normal_5fcd019b85c61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388842/normal_6037e2abd6dad.pdfIn PDF document text
    • https://tatogupuragafa.weebly.com/uploads/1/3/4/0/134096405/2463325.pdfIn PDF document text
    • https://sizugive.weebly.com/uploads/1/3/5/9/135993047/7217653.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366973/normal_6001e28beb42e.pdfIn PDF document text
    • http://texulateniz.iblogger.org/world_news_report_hospital_rankings.pdfIn PDF document text
    • https://kunokepipadiri.weebly.com/uploads/1/3/3/9/133997431/b86353767d20.pdfIn PDF document text
    • https://cdn.sqhk.co/riroxale/VYhbgf3/winogolis.pdfIn PDF document text
    • https://binufigelivu.weebly.com/uploads/1/3/4/7/134775083/2918631b6ad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505326/normal_5fe3a53ac3584.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vujurow.rf.gd/98614777086.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/fopinenonamiruta.pdfIn PDF document text
    • http://tatefes.rf.gd/bubble_island_2_pop_shooter_mod_apk.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_off0000e31e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE31E 5120 bytes
SHA-256: 11391ed163e5e08ecef8450f20e56b788d8655544414ee063b73549cb59bf4c6
font_01_sfnt_off0000f48c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48C 10316 bytes
SHA-256: af14018a1441b638b6831d982c7648a6b8238bfe43e0176c1d1b9937314f70d4