Malicious PDF — malware analysis report

Static analysis result for SHA-256 e98b4a8957c1e09f…

MALICIOUS

PDF

61.7 KB Created: 2021-02-12 15:59:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e81852efd930a8b46cce270c4f782f29 SHA-1: 7e6c8e4686effc60635f4c0dffbe13569fb2bfcb SHA-256: e98b4a8957c1e09f3e8fc1ae72f6cc118bc6f2423393917ce356ab24c60fdd56
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://baarspo.ru/wix?keyword=district+3+nyc+middle+schools PDF link annotation
    • https://dexuganepo.weebly.com/uploads/1/3/1/6/131608037/05be5ebdde85.pdfIn PDF document text
    • https://rezopagukivuru.weebly.com/uploads/1/3/5/3/135307961/patago.pdfIn PDF document text
    • https://paporese.weebly.com/uploads/1/3/1/0/131071113/b57f429282ac62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447646/normal_5fd65757085b7.pdfIn PDF document text
    • http://meetsoda.club/simple_solar_charge_controller_circuit_diagramaw653.pdfIn PDF document text
    • http://teaapple.space/android_open_source_project_rom52zz7.pdfIn PDF document text
    • https://veminimuvaw.weebly.com/uploads/1/3/4/6/134630651/pegawesekifokafi.pdfIn PDF document text
    • http://getcreditreport.info/eclipse_installer_ubuntud4fna.pdfIn PDF document text
    • https://rikidunojig.weebly.com/uploads/1/3/4/4/134488605/volizotuw.pdfIn PDF document text
    • https://dinowupeguf.weebly.com/uploads/1/3/1/3/131379410/rowasanapo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422148/normal_6017796ae2a6c.pdfIn PDF document text
    • https://pegepigav.weebly.com/uploads/1/3/4/4/134481067/neriwatoxesozotad.pdfIn PDF document text
    • https://telidububiz.weebly.com/uploads/1/3/1/4/131452987/vawazowakam.pdfIn PDF document text
    • https://murexaxinafol.weebly.com/uploads/1/3/4/4/134456221/turazozadoji-pikoderajut-nulesolefa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pezofut/kukagim.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_off0000b554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB554 5232 bytes
SHA-256: 9876eae3b4531878af20e15948f0f53d390f22d211ee0556262e3d936471900d
font_01_sfnt_off0000c701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC701 10308 bytes
SHA-256: d8b9486e4276ecbd6add18585072e05672b7b994d90633f4d69ab38f7b257084