Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b1908e7c5859a65…

MALICIOUS

PDF

66.2 KB Created: 2021-02-25 18:19:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: ba28f8b4d5b3b21b38f4570139e7d8a7 SHA-1: 859839f09a40c0ae0ddef2dc346ca648163ea0a4 SHA-256: 7b1908e7c5859a65eb8d867fcb52b1665c84bf07742e3c6301d4acc582d04c89
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://seumenha.ru/award?keyword=cen+tech+battery+charger+fix PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476578/normal_601fe1b530ce4.pdfIn PDF document text
    • https://koloputumoti.weebly.com/uploads/1/3/4/8/134887370/8b0f21a2dd6ddb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380237/normal_5fef99ee9f1f9.pdfIn PDF document text
    • https://kukaweferoba.weebly.com/uploads/1/3/4/7/134754127/8947710.pdfIn PDF document text
    • https://detifurotuso.weebly.com/uploads/1/3/5/3/135321595/9e7677e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368496/normal_601b8ed8dd3db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410432/normal_5fd7924827dc3.pdfIn PDF document text
    • https://kuwomodelinero.weebly.com/uploads/1/3/0/7/130776449/lajawi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418000/normal_5fd3dcde3d886.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500889/normal_5fc7c67a53753.pdfIn PDF document text
    • https://jusegopij.weebly.com/uploads/1/3/4/4/134480833/zimuweju.pdfIn PDF document text
    • https://vokarojunez.weebly.com/uploads/1/3/2/6/132696330/153384.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kekepujubulegev.epizy.com/gipajadopazofekimegel.pdfIn PDF document text
    • http://jabekufiji.epizy.com/lobeketotobotibawoz.pdfIn PDF document text
    • http://rafelisugamiraw.rf.gd/bezojubosipedidol.pdfIn PDF document text
    • https://www.harborfreight.com/3-in-1-portable-powerIn 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_off0000c727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC727 5148 bytes
SHA-256: 67a11a1d960d80b368d4814c3434ffd48199a5fe492b62012e72b3f32ebd189d
font_01_sfnt_off0000d8bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8BF 10348 bytes
SHA-256: 807d7cd96072aa1d68bb9ea7a45ef04f38f260bc10f68591c2bdc612fb8d045f