Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0ba6ee56953d920…

MALICIOUS

PDF

70.7 KB Created: 2021-02-24 03:36:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 513771338ed88d7385df012ef8b52ffd SHA-1: ab3e1bda6998fc0a083809db3a83769be5c94b84 SHA-256: b0ba6ee56953d9200434cfc05d385d3db131b18c9b3e0ac8fa3bb00f1a042e14
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=trigonometria+1+bachiller+ejercicios+resueltos In PDF document text
    • http://tirudibemaj.22web.org/wifedefimopogofulotisukub.pdfIn PDF document text
    • http://xisulekotitis.iblogger.org/ios_guidelines_apple.pdfIn PDF document text
    • https://cdn.sqhk.co/sikudile/hv6heda/la_redoute_clothing_usa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456132/normal_5fe6f69e17e7f.pdfIn PDF document text
    • http://daimontimur.org/30652351632dihwr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487424/normal_5ff66935d9eda.pdfIn PDF document text
    • http://puwobero.22web.org/android_canvas_draw_rectangle_border.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427781/normal_5fd870b44118b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387037/normal_601e4b1814284.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482207/normal_5fd053778cef7.pdfIn PDF document text
    • https://cdn.sqhk.co/tuseliwi/Yhi9BEr/90553895432.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://luremugaxufarup.epizy.com/mifulorased.pdfIn PDF document text
    • http://jiwigazuvix.rf.gd/maggie_a_girl_of_the_streets_chapter_18_summary.pdfIn PDF document text
    • http://juvugakor.rf.gd/46932675644.pdfIn PDF document text
    • http://zatafefot.rf.gd/49655628753.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_off0000d2c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2C9 5428 bytes
SHA-256: c2e9542f96d1519a713256291f8f60fec4580b06125b953643c45b6698fa67a4
font_01_sfnt_off0000e51f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE51F 11992 bytes
SHA-256: cb66bcabcd1159decd803fd2619b66685ca12d6d942c34a585a89ff8c969caf3