Malicious PDF — malware analysis report

Static analysis result for SHA-256 2349d5a5eb7197e9…

MALICIOUS

PDF

75.7 KB Created: 2021-03-27 20:33:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 3e21e2e83029f0efc1affb0f1ad5a09c SHA-1: 2ef0740a0324b76d88b1a8c0c6ea511f7c41516d SHA-256: 2349d5a5eb7197e9d94740bb06310593ba628d4e8799c75da83757b8c01108f3
66 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged by ML classifiers as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high volume of links to disposable hosting, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards an attempt to redirect users to malicious content, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://ponafet.ru/123?utm_term=well+yes+but+no+template PDF link annotation
    • http://sipipewawezizuf.getenjoyment.net/jutizataviwoxew.pdfIn PDF document text
    • http://fenellalucynelle.info/78478258840d0l95.pdfIn PDF document text
    • http://vozajomaralamer.mygamesonline.org/ashrae_62._1_espaol.pdfIn PDF document text
    • https://jikufowawuful.weebly.com/uploads/1/3/2/8/132814232/9350239.pdfIn PDF document text
    • http://rawuzexo.iblogger.org/kid_icarus_sheet_music.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466161/normal_605463393e5fb.pdfIn PDF document text
    • http://tezuveripoxub.mypressonline.com/amikacina_dosis_adultos.pdfIn PDF document text
    • http://selozufuwadapuw.66ghz.com/78645644601.pdfIn PDF document text
    • http://sidufapas.mywebcommunity.org/66054903823.pdfIn PDF document text
    • http://napufokotipo.getenjoyment.net/bismu_jet_bula.pdfIn PDF document text
    • http://mybestchan.online/scott_pilgrim_vs_the_world_characters_movier9u7i.pdfIn PDF document text
    • http://parhelifrl.space/64245360056ma04.pdfIn PDF document text
    • http://ralugugifoxatir.scienceontheweb.net/the_celestine_prophecy_online.pdfIn PDF document text
    • http://vufonaxorugipol.iblogger.org/riruworalidorar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409806/normal_5feb0a8ad17cc.pdfIn PDF document text
    • https://vanizubifimid.weebly.com/uploads/1/3/0/8/130874516/2978509.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://zifovusadenu.rf.gd/formulas_de_caida_libre_despejadas.pdfIn PDF document text
    • http://ziwemasux.myartsonline.com/twilight_movie_download_free.pdfIn PDF document text
    • http://ledaruwevegoxu.onlinewebshop.net/ronafepirerewero.pdfIn PDF document text
    • http://gixufedexakav.atwebpages.com/sbi_card_statement_password.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000deca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDECA 4956 bytes
SHA-256: cb0bd51c9cca180d2f4747088933b4169bd3514382bcaba2a337bfb2f6f7c16d
font_01_sfnt_off0000ef9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9A 10664 bytes
SHA-256: e20667130153b3321acf23336df4f6636f37a69eba63be9c903db3c73b79aa93
font_02_sfnt_off000113e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113E5 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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