Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e9bc58894aefbe5…

MALICIOUS

PDF

71.0 KB Created: 2021-01-30 16:25:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 5ee50f6bda365d77eb12231f388ab0f5 SHA-1: dc2ec09c5128ab1041de221d5eaab7cc32a46c2f SHA-256: 4e9bc58894aefbe5423b8a2aeeae229d4583456b58da3d8485bdac7ededbb901
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/wb?keyword=soviet%20posters%20archive PDF link annotation
    • http://ryduslim.website/kexopelotexawu3cm.pdfIn PDF document text
    • https://cdn.sqhk.co/remimidotomi/jb53iid/6877837220.pdfIn PDF document text
    • http://braco.ru/swot_analysis_of_nestleoi35m.pdfIn PDF document text
    • https://modibidusez.weebly.com/uploads/1/3/4/0/134096811/04779f1348f.pdfIn PDF document text
    • https://cdn.sqhk.co/dedogupazib/jcOaLjh/putijujagidi.pdfIn PDF document text
    • https://bedaruwi.weebly.com/uploads/1/3/5/3/135326402/merisotapuvive_leliwiduve_nibij_vidoj.pdfIn PDF document text
    • https://xafadefuvabajil.weebly.com/uploads/1/3/0/7/130776308/f0295899.pdfIn PDF document text
    • https://wovigapugup.weebly.com/uploads/1/3/2/7/132710676/sifazulav.pdfIn PDF document text
    • https://cdn.sqhk.co/navuwamas/iikgcjj/mytello_cheap_international_calls.pdfIn PDF document text
    • https://pomorewosijimop.weebly.com/uploads/1/3/2/6/132681296/notuvakirim.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/7349221.pdfIn PDF document text
    • http://avtoshtorki.shop/73093887226n15bz.pdfIn PDF document text
    • http://blue-tick-central.com/werinezaduvozanekuxixuvesppdxz.pdfIn PDF document text
    • https://cdn.sqhk.co/wodaximewule/fgijaii/73735717180.pdfIn PDF document text
    • https://damatabawapu.weebly.com/uploads/1/3/1/3/131379320/miduvejevi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d98f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD98F 5152 bytes
SHA-256: c719a19f3a0dc0fced12e9784c710751715e6c234c42ed0b30c5ccfeef16850c
font_01_sfnt_off0000eb14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB14 10672 bytes
SHA-256: 7f0434534a14265b80a476d051755e9e5944994c975bd123e05a2ecedc2e55f0