Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2325920a32f9ce1…

MALICIOUS

PDF

81.3 KB Created: 2021-03-16 23:07:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ead75675ebff39a4e0601a4ce2632444 SHA-1: 322f278ec776d3f6c441d204b3c430236ff03b94 SHA-256: e2325920a32f9ce1c21abaddac155892f5f1ae1943c9be36aee0719761643717
134 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it is a link farm and a phishing lure, specifically mentioning an invoice or payment context. It embeds multiple URLs, one of which is used in a 'house rental agreement template chennai' context, suggesting a social engineering attempt to trick the user into clicking a malicious link. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for malware distribution or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://dafemum.ru/123?utm_term=house+rental+agreement+template+chennai
    • http://instapriz365.site/centrales_termicas_de_ciclo_combinado_santiago_sabugal3y81f.pdf
    • http://bachanalytics.com/el_principito_capitulo_10_11_12_resumenhxe3x.pdf
    • https://cdn-cms.f-static.net/uploads/4497109/normal_6019dfb351c74.pdf
    • http://prizinsta.online/sistema_internacional_de_unidades_de_medida_y_sus_equivalencias2q2oh.pdf
    • http://xaredazisom.mywebcommunity.org/32056690314.pdf
    • http://kyhni.site/toxazojigapike7ctq4.pdf
    • http://zewegirugiputix.22web.org/93670283682.pdf
    • http://remoliwagofaju.mywebcommunity.org/panchatantra_short_stories_in_telugu_free_download.pdf
    • http://dutarotanazosuv.medianewsonline.com/supply_chain_management_notes_for_mba.pdf
    • https://static.s123-cdn-static.com/uploads/4366000/normal_5ffefab83999a.pdf
    • http://vas-rem.ru/9917713361d9tf2.pdf
    • http://1s.london/seguzinirasec0yy4.pdf
    • https://static.s123-cdn-static.com/uploads/4375206/normal_6002488f1e3b4.pdf
    • http://orbitan.fun/klein_tools_ncvt-2_dual_range_voltage_tester_manualeavdf.pdf
    • http://pimifawimonidij.mywebcommunity.org/62885535912.pdf
    • http://famozosivupiwij.sportsontheweb.net/how_to_get_share_the_wealth_cards_in_life.pdf
    • http://madewithsunshine.com/92557473345x970r.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nupuzawov.onlinewebshop.net/friedrich_nietzsche_pronunciation_francais.pdf
    • http://wavudipikudela.epizy.com/samsung_android_10_beta_programm.pdf
    • http://kalasoziluxolim.myartsonline.com/sukimoverokunowexixuwup.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001019e.bin
321efcedc538f1d8daeec389e6e78960b42e8e18712ac58054f5c76b29aa4c0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1019E 5308 bytes
font_01_sfnt_off0001137e.bin
f0196d546327cfad55e16fcac9cae753bb89cf8de6a517d9ecf70fdc7851b92a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1137E 10552 bytes

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