Malicious PDF — malware analysis report

Static analysis result for SHA-256 d448838e59772248…

MALICIOUS

PDF

153.7 KB Created: 2021-05-15 23:59:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 00e9758c07d7da2e0e7558bbb23827eb SHA-1: 1518891f318083ae2df615c096bb6fec5177213a SHA-256: d448838e59772248a792dd7c35bc661b4429819e49ca77f2204041e72af5e7d2
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, including a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The presence of embedded URLs suggests the document's primary purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://lozipotod.ru/strik?utm_term=cradlepoint+ibr600c-lpe+manual PDF link annotation
    • http://tryici.xyz/vip_722k_hd-dvr_dual_tunerjvm6k.pdfIn PDF document text
    • http://getliterate.online/32344354064sxw7w.pdfIn PDF document text
    • http://energierecrute-emplois.com/lil_boosie_incarcerated_free_album_download_websitesael9g.pdfIn PDF document text
    • http://ozalupa.space/fefovazenuxzyf8a.pdfIn PDF document text
    • http://contarinihome.com/90385259788xiho1.pdfIn PDF document text
    • http://nicechange.space/tefepivobexudabesl365p.pdfIn PDF document text
    • http://nububezobuto.22web.org/fur_elise_full_sheet_music.pdfIn PDF document text
    • http://woxelupasejuji.22web.org/fundamentals_of_chemistry_download.pdfIn PDF document text
    • http://alkostore.xyz/bafogaravedewat97vio.pdfIn PDF document text
    • http://cuzinfo.ru/11956119439mbka9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f7b0ef4b-317e-4f07-901b-4de91a029b50.filesusr.com/ugd/50f142_ea56df04efe2472cba9e2c00488e4ae6.pdf?index=trueIn PDF document text
    • http://todizegi.epizy.com/polar_bears_2019_endangered.pdfIn PDF document text
    • https://aa4c2489-c93b-4667-afab-104bf5323bad.filesusr.com/ugd/8b49c6_c421078a46e042baa5ca5e8916465234.pdf?index=trueIn PDF document text
    • https://73a1781f-5c9f-4c76-8a11-a8e8c44f336a.filesusr.com/ugd/d9f7b5_73418e20014b4bd3aa621c81ee27dab7.pdf?index=trueIn PDF document text
    • https://3fb740b9-71d8-4183-8edb-de11b68c0a29.filesusr.com/ugd/1fbf8b_6f51e62fbc1644eab19eed6a90430613.pdf?index=trueIn PDF document text
    • http://tekaxipi.epizy.com/balo_da_informtica_sumar_sumar_sp.pdfIn PDF document text
    • https://18e99e0c-7034-4a8c-9069-267580a295b8.filesusr.com/ugd/b337f5_652a92102abb4f368ce9a9e1bff31664.pdf?index=trueIn PDF document text
    • https://24d1f61b-f5c5-4d2f-8180-62589f44e8d8.filesusr.com/ugd/eed56f_c1041951e9c34b2b9639703d8ec11dc9.pdf?index=trueIn PDF document text
    • http://ledudixip.epizy.com/a4_size_brochure_templates_free.pdfIn PDF document text
    • http://dewakerulu.epizy.com/renefedam.pdfIn PDF document text
    • http://zisikatalim.epizy.com/79253341749.pdfIn PDF document text
    • https://b1b0174c-961c-4936-87f6-765e1132391e.filesusr.com/ugd/6cf804_a22525725e7f46ed9131479749949b88.pdf?index=trueIn 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_off00021d8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21D8C 5416 bytes
SHA-256: 229fbd5886461ea0d033d1167be5640b272e02d0cf7439e7325b1bdc14ef8a97
font_01_sfnt_off00022fda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22FDA 12260 bytes
SHA-256: 414ab25b9a9583a199b4dc154257ebae1117d8de705ee082627be504fe87b643

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