Malicious PDF — malware analysis report

Static analysis result for SHA-256 651b74e11304bdb7…

MALICIOUS

PDF

70.6 KB Created: 2021-02-11 06:34:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 3ba4f48706594d74e7dd3cf6abadf029 SHA-1: d32705eeeb49175e3f0defbb09e7b7a8722c0ccd SHA-256: 651b74e11304bdb78cda50bbb83968974e6b7e9032cdeb0c595bc26ea3bd3cd4
244 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/aws?utm_term=self+guided+walking+tours+of+ireland In PDF document text
    • https://xipasole.weebly.com/uploads/1/3/4/8/134853136/jizuj.pdfIn PDF document text
    • https://depularo.weebly.com/uploads/1/3/4/6/134601330/d97879e9e2e4d.pdfIn PDF document text
    • https://sizeduxaginota.weebly.com/uploads/1/3/2/7/132712537/funuwa.pdfIn PDF document text
    • https://kererivodukeje.weebly.com/uploads/1/3/5/3/135303009/4046268.pdfIn PDF document text
    • https://vususutuf.weebly.com/uploads/1/3/4/6/134634118/fuparirata_gerima_povevusolodule_zugaginimap.pdfIn PDF document text
    • https://ramimuluvisefo.weebly.com/uploads/1/3/0/7/130775145/wenubupoxijurexapete.pdfIn PDF document text
    • https://tenekitu.weebly.com/uploads/1/3/4/0/134018212/kugebig_xutajavimafuw_tinekuwara_juxulez.pdfIn PDF document text
    • http://lnstagrambusiness.com/carly_rae_jepsen_emotion_album_zipadml6.pdfIn PDF document text
    • https://fuvetowonilup.weebly.com/uploads/1/3/1/3/131383456/sefedak-lizifuvoduza-ronig-dazafemujo.pdfIn PDF document text
    • https://duxezixupedad.weebly.com/uploads/1/3/4/0/134095883/kuwomosozez.pdfIn PDF document text
    • https://ramilelajebow.weebly.com/uploads/1/3/4/6/134647205/bidurofibonedim-zupavevaxupu-mekadaratemugad-lowuzudila.pdfIn PDF document text
    • https://giretalude.weebly.com/uploads/1/3/4/6/134677333/7843878.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/xozeb/gatojotajapodegitoxonuvex.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/twitter_login_android_github.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/67050192807.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_off0000d653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD653 5332 bytes
SHA-256: 4dc2f22f63e6e30eff0f21fae7cd8171ff6f7fb8e3ce9ac2a7273bc49185baf2
font_01_sfnt_off0000e8a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A0 10876 bytes
SHA-256: 4a4b0763367a4c60d754c7ea5f21358e8c3aaf98310e2f90cc6c7f05669e63c7

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