Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc29f9bd4a08d004…

MALICIOUS

PDF

121.8 KB Created: 2021-03-02 04:56:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 6b73c8427a43485775d58ea67428e4de SHA-1: dd86c3765fab59cdc66dd33966af6e8c1c968149 SHA-256: dc29f9bd4a08d00457749953e5335b516a0e2737d8fd99ae7544c3b2db8cb6b7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous embedded URLs, many pointing to disposable hosting, strongly suggests a phishing or malware distribution attempt. The ML classifier also indicated a high probability of maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/wb?keyword=what%20is%20a%20poet%20preface%20to%20lyrical%20ballads PDF link annotation
    • http://joblanc.xyz/8904097929c9rj.pdfIn PDF document text
    • http://beviluxenumiliv.mywebcommunity.org/que_es_cianuro_de_potasio.pdfIn PDF document text
    • http://wdd13.ru/getting_to_know_arcgis_pro_second_editionb4153.pdfIn PDF document text
    • http://tulavesew.getenjoyment.net/dewavodexos.pdfIn PDF document text
    • http://wejuzofibab.medianewsonline.com/warof.pdfIn PDF document text
    • http://creamwalls.online/204432162375ksue.pdfIn PDF document text
    • http://tomogorman.com/90865198625iyle3.pdfIn PDF document text
    • http://goshop32.site/wuvudopulivazatusunabo9a4li.pdfIn PDF document text
    • http://zijixiteluwek.scienceontheweb.net/xagemibepodaxadufegam.pdfIn PDF document text
    • http://e-devletturkiyeaidatsistemimgovtr.com/startup_ranking_framework_2019fa1xj.pdfIn PDF document text
    • http://jepisafidezegun.scienceontheweb.net/lujowijalebidijuvoluw.pdfIn PDF document text
    • http://mavigawika.scienceontheweb.net/52289230456.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tofalit.myartsonline.com/17978704400.pdfIn PDF document text
    • http://volajigatume.epizy.com/7930931399.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_off0001a208.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A208 5496 bytes
SHA-256: 21455376cc74623bdbdbe07cb12359726bd8bad20575a33f436d0cd01015bda5
font_01_sfnt_off0001b4c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B4C1 10732 bytes
SHA-256: 21c3ba695a9aa62eda0fcc84af3d5607884be9e172a8dd5f54a9cdad45e3bfed

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