Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf580d188c461777…

MALICIOUS

PDF

65.9 KB Created: 2021-02-12 12:04:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 4b8266a9d5259be5bb2d1bcd456dab0f SHA-1: 7e42cadecfdf413ae10f47739ae25bdf7693954d SHA-256: cf580d188c461777490d89f67d19b8814702b8507c749e7f5d09e5d47b0d8d3b
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://druttle.ru/wix?keyword=start+something+that+matters+pdf+download PDF link annotation
    • https://giretalude.weebly.com/uploads/1/3/4/6/134677333/mibax.pdfIn PDF document text
    • http://setifol.66ghz.com/triple_negative_breast_cancer_nccn_guidelines.pdfIn PDF document text
    • https://wumefabifu.weebly.com/uploads/1/3/4/8/134888429/rosunagiwujizuwa.pdfIn PDF document text
    • https://muwewixobajigu.weebly.com/uploads/1/3/4/3/134312624/7869163.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425759/normal_60168229c29a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460450/normal_5fe655d9e5ed9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365638/normal_5ff80fb594e24.pdfIn PDF document text
    • https://dusomekekonipa.weebly.com/uploads/1/3/4/5/134580960/4eb662e.pdfIn PDF document text
    • https://fogoranamixite.weebly.com/uploads/1/3/5/3/135390362/3941676.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451970/normal_6015a5302bedb.pdfIn PDF document text
    • https://varemajog.weebly.com/uploads/1/3/4/5/134585454/tepofodas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://xuvunemomot.epizy.com/12315458890.pdfIn PDF document text
    • http://kupikobu.epizy.com/padinajadizok.pdfIn PDF document text
    • https://fantasticexplore.blogspot.com/?book=0812981448In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA0E 5436 bytes
SHA-256: 84c754610899d9c915e5a2b8a5791813ad4cb927c193c7c05b09ed07fa003808
font_01_sfnt_off0000cc67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC67 9448 bytes
SHA-256: 635d39f83d62718b28dee811bcae7a036f655014dc99c9c67f0ffe12eddcdd80
font_02_sfnt_off0000ecb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB6 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3