Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4560b6277925279…

MALICIOUS

PDF

76.1 KB Created: 2021-04-24 07:44:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 749219b60ecc0259da21b8c274381c3e SHA-1: d4d490ec0dc31dea481f4e292b6d1e358b046102 SHA-256: d4560b627792527989f811e778b5c55793f078080523e7d548a1a90c9dbcefb1
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 high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm designed to obscure the final malicious destination. The presence of external URIs and the link farm structure suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://kuzutuzo.ru/strik?utm_term=death+cure+trailer
    • http://nibewubixela.getenjoyment.net/gesowapizufematidarume.pdf
    • https://wagoburaf.weebly.com/uploads/1/3/4/5/134524365/506aa1f0.pdf
    • https://xevoniwibefi.weebly.com/uploads/1/3/5/9/135984774/gavajinogasojozize.pdf
    • https://naxozafo.weebly.com/uploads/1/3/1/4/131483391/bejetuli_masomelaf.pdf
    • http://xazonojader.mywebcommunity.org/isothermal_and_adiabatic_process.pdf
    • http://zizodoroluxonaf.sportsontheweb.net/emperor_clock_company_model_300_series.pdf
    • http://kowojolajamuv.getenjoyment.net/40449568330.pdf
    • http://wunanufirum.22web.org/86993342602.pdf
    • https://rekoxexegatetun.weebly.com/uploads/1/3/1/4/131452740/pozifa.pdf
    • http://wotedogupowu.sportsontheweb.net/85729522499.pdf
    • http://bititoxoguxal.22web.org/28592440104.pdf
    • http://dommasters.site/dilowuropiypaqx.pdf
    • https://nuvafuriwevejuf.weebly.com/uploads/1/3/2/8/132814848/kolikezipej-wivikiv-baluda-pubezu.pdf
    • http://rotawafuwuno.scienceontheweb.net/50458982612.pdf
    • http://astropsychology.website/1433392484xsq9l.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://sajulugebimisu.myartsonline.com/46750029298.pdf
    • http://zawemitop.epizy.com/les_asymptotes_cours.pdf
    • http://vilepobafomunow.atwebpages.com/what_is_the_cheapest_young_living_oil.pdf
    • http://zedofaxuboz.onlinewebshop.net/mavarubakum.pdf
    • https://96a604d4-6f4e-42dc-90fb-b802e1cf4ed0.filesusr.com/ugd/6ef60c_f64d584696d4493694cfcf5b3e148c20.pdf?index=true
    • https://76c9fb28-c10e-4950-85be-37de24a2ede8.filesusr.com/ugd/fa32a6_bf27cbe5fd234c9ab0361495cc8c54e2.pdf?index=true
    • http://vogurumekadobet.epizy.com/mumetex.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc70.bin
a127a24a9e21d76c0844b474ffd3883ada76689e4ea33b99b05e3295ca1c7f81		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC70 4376 bytes
font_01_sfnt_off0000db66.bin
857e5f6720a49f741a395343b52775af7411d0dfbbe1ab793b04a8d8ed2228ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB66 10328 bytes
font_02_sfnt_off0000feca.bin
d78d7cc1a68daa951b4fbccbcfb906d5a08ad384f187125596154666a45abe72		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFECA 16060 bytes
font_03_sfnt_off0001135f.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1135F 4324 bytes

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