Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee47899c223f0ec0…

MALICIOUS

PDF

77.6 KB Created: 2021-02-22 02:58:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 29a0ea539425068dfdb45f8c1ad3cfe2 SHA-1: 382ed0339bce74f1ca686eda5ec604545db00509 SHA-256: ee47899c223f0ec0059a63068662f76bec496ba77b4de3672a61d7c12186dc58
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of an attempt to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

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://baarspo.ru/123?utm_term=whit+iain+banks+review PDF link annotation
    • http://henrysavbr.site/18810757514lzkmb.pdfIn PDF document text
    • http://mabay.fun/census_2020_maharashtra6x9qg.pdfIn PDF document text
    • https://mafetoga.weebly.com/uploads/1/3/0/8/130874134/08e33720bde37.pdfIn PDF document text
    • http://lnstagramlivesupportcenter.com/windows_vista_home_premium_downloadpcv60.pdfIn PDF document text
    • http://dosaxurezifoset.22web.org/chemical_reactions_of_acids_and_bases_worksheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415934/normal_601e6fb9e0f52.pdfIn PDF document text
    • http://dugules.iblogger.org/jisasub.pdfIn PDF document text
    • http://makeyourself.xyz/guvusebumugixipewinida6pff2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472216/normal_602f7d2019c83.pdfIn PDF document text
    • https://fusufuxono.weebly.com/uploads/1/3/1/6/131606103/gesijes-sotaxarusul-duwat-giborus.pdfIn PDF document text
    • https://zamigemunizi.weebly.com/uploads/1/3/4/3/134347724/7433897.pdfIn PDF document text
    • http://dutilajojav.22web.org/polerakelefanepod.pdfIn PDF document text
    • https://gixakipero.weebly.com/uploads/1/3/1/4/131412713/tisogiguwuxitonigozu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kudurefusi.epizy.com/82876646274.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_off0000f469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF469 5112 bytes
SHA-256: 723ec86c79dd8153847794f4c366059bc5152d1c05b258e3adff23a6841ad1df
font_01_sfnt_off000105dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105DC 10512 bytes
SHA-256: 9ad373300bca893924d8eb3df635080fa49b6ce76ad6b7e6a78c5a299bf5b077

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