Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbf8bf87c24df757…

MALICIOUS

PDF

72.0 KB Created: 2021-03-03 03:15:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 15e67a18602c51e785f638de388f4a0d SHA-1: 92195872326d3f38bd951c442a0f8b1a3902d162 SHA-256: bbf8bf87c24df75790f3633c7a4f6521fa64a219154d40719edcc3605ae70d69
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/wix?keyword=cleric+spell+slots+3.5 In PDF document text
    • http://morosoxumexax.iblogger.org/33460425608.pdfIn PDF document text
    • https://cdn.sqhk.co/nexasolonit/wjaLljc/vabexekowuxasav.pdfIn PDF document text
    • https://cdn.sqhk.co/fosulavale/i5Yswje/begekomenegevaxesisogoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367635/normal_603bcec85783e.pdfIn PDF document text
    • http://xakojudanek.66ghz.com/best_logo_design_software_online_free.pdfIn PDF document text
    • https://loruwudo.weebly.com/uploads/1/3/4/7/134738316/2546949b65.pdfIn PDF document text
    • https://buzufurabobozu.weebly.com/uploads/1/3/5/3/135304208/919846.pdfIn PDF document text
    • https://taxufutusa.weebly.com/uploads/1/3/4/5/134514166/5568180.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413975/normal_5fca5fe4ab082.pdfIn PDF document text
    • http://kuzamejeluwezik.22web.org/xewozaka.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://parubixus.rf.gd/45131685476.pdfIn PDF document text
    • http://mopiluganaloriz.epizy.com/pawuvolukilaxex.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_off0000e06f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06F 4940 bytes
SHA-256: 99e8115030fd536bfdf2bc79e9407f296748e4226c070e08b3dd0ec8590b3938
font_01_sfnt_off0000f152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF152 9992 bytes
SHA-256: ac0e4125e835b425a9d13b29391532bc0416da9a289acb348170d887b62a474f