Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8be5a14745036a6…

MALICIOUS

PDF

70.7 KB Created: 2021-02-24 22:21:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: a56befbcbec1e376c6e71b37639b11f2 SHA-1: c78af0f4a12b209318bb93d6e90d59e0fdbb10ff SHA-256: d8be5a14745036a6ea133cbc474cb9601004f1a2ad53048ac1932aef3d190850
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://bologen.ru/award?keyword=surface+area+of+a+triangular+prism+worksheet+grade+6 PDF link annotation
    • https://butevexonukuzi.weebly.com/uploads/1/3/2/6/132681970/33f4243a1.pdfIn PDF document text
    • https://femovoba.weebly.com/uploads/1/3/0/7/130775826/bebudoseta.pdfIn PDF document text
    • https://danodukuwen.weebly.com/uploads/1/3/1/6/131637043/levugonidabesum.pdfIn PDF document text
    • https://jexesatarufo.weebly.com/uploads/1/3/1/4/131437655/beparelipatix.pdfIn PDF document text
    • https://rogujodur.weebly.com/uploads/1/3/4/8/134899240/xizivixe.pdfIn PDF document text
    • https://voteriboxovoviv.weebly.com/uploads/1/3/4/3/134352377/jabetodesixusafekeli.pdfIn PDF document text
    • http://blognews.top/738342242647ml92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365652/normal_602d247c97bf9.pdfIn PDF document text
    • https://giwitororozesal.weebly.com/uploads/1/3/4/6/134652081/zumifawo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mokupemoraworal.epizy.com/keselawonubiv.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/37880436686.pdfIn PDF document text
    • http://wotixoweg.rf.gd/nonfiction_text_structure_paragraph_examples.pdfIn PDF document text
    • http://mapureju.epizy.com/fikozusuboxugaz.pdfIn PDF document text
    • http://gakowutegufez.rf.gd/46861885821.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/lithermans_limited_misguided_angel.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_off0000d374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD374 5984 bytes
SHA-256: fd810b446b794e3a42119265d8427bb381446ad6d92f4912df47410f1594c156
font_01_sfnt_off0000e7b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B5 10488 bytes
SHA-256: d916796487536b8ad293b095256b4b0cd70fc19caba3c2ccbabe3ecf35ccf5a7