Malicious PDF — malware analysis report

Static analysis result for SHA-256 f34ead768a2cd44c…

MALICIOUS

PDF

81.6 KB Created: 2021-03-08 00:33:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: a48a59d807d234ba41b082497f6b90fe SHA-1: 8f1b6c1272bad51fce1ff00a1da1977ce318c5f3 SHA-256: f34ead768a2cd44c9438b7b669a252e74ae19dce473daf79eb60c3ec5db00cff
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to search terms, further supporting a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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/wix?keyword=come+set+your+rule+and+reign+chords+pdf PDF link annotation
    • http://believes.space/95562319666flu67.pdfIn PDF document text
    • https://cdn.sqhk.co/xodawakadude/hxkhaif/fesizobiwokijabigirulobeg.pdfIn PDF document text
    • http://lnstagramverifiedbadge-form.com/69118151639s2f6m.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501501/normal_5ff54bced7ffb.pdfIn PDF document text
    • http://rolivazugatar.scienceontheweb.net/do_you_capitalize_than_in_a_title.pdfIn PDF document text
    • http://tulusujubige.mygamesonline.org/98915562011.pdfIn PDF document text
    • http://pibalefiw.22web.org/trait_and_behavioral_theories_of_leadership.pdfIn PDF document text
    • http://mixutadumekaje.mypressonline.com/lubowexunifogoruri.pdfIn PDF document text
    • http://borezopesane.22web.org/82772070291.pdfIn PDF document text
    • https://cdn.sqhk.co/jojikoxazew/j5hiJcu/tumadib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472200/normal_601e7c27466b1.pdfIn PDF document text
    • http://kavademive.sportsontheweb.net/17329265158.pdfIn PDF document text
    • http://wonder-ita.fun/wewerolu6a5fd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rasunafosav.epizy.com/70089293341.pdfIn PDF document text
    • http://jodafibo.epizy.com/formula_para_convertir_pulgadas_cubicas_a_centimetros_cubicos.pdfIn PDF document text
    • http://kisaxutuse.epizy.com/what_are_the_different_dyson_vacuum_attachments_for.pdfIn PDF document text
    • http://bopisumeku.atwebpages.com/nerenopegidoworux.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_off0000f466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF466 5576 bytes
SHA-256: c7afa5c79924230f13572527e2648819403a55df4fc50f770982bb37b2de3956
font_01_sfnt_off00010737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10737 15372 bytes
SHA-256: a9652ab5e7b1e8f88acd577cc2884d8baf71a219c9a2b3c1cf273f490bc50d7e

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