Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce232be60ae4afcc…

MALICIOUS

PDF

92.1 KB Created: 2021-03-01 10:55:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aaf151f2dabd59e9794e51d93501bf3e SHA-1: d31218c0c9ec28818ce25bd1c3022c1bd1067e36 SHA-256: ce232be60ae4afcce7d05725d8fc410318fb8eaf37d465375b765950f4450f1e
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URI that redirects to a URL associated with 'imagery worksheet pdf answers', likely a lure for phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/wix?keyword=imagery+worksheet+pdf+answers
    • http://rifimakegezibor.22web.org/71486118884.pdf
    • http://naliputa.mywebcommunity.org/do_not_fear_in_the_bible_365.pdf
    • http://pejazadajenatew.getenjoyment.net/ganedekosegagide.pdf
    • https://static.s123-cdn-static.com/uploads/4457560/normal_5ffcbb75e53df.pdf
    • http://koolmaxt.online/nosunolejoruv3supi.pdf
    • http://duplicwcnj.space/16347672194lkvuy.pdf
    • http://rirelavemug.iblogger.org/11391293311.pdf
    • https://static.s123-cdn-static.com/uploads/4402014/normal_5fce7d63d1afa.pdf
    • http://de-bewertung-id-q2e5t23.top/vigunevuridutepamelegirer225x5.pdf
    • https://cdn-cms.f-static.net/uploads/4495240/normal_6027897210e88.pdf
    • https://cdn-cms.f-static.net/uploads/4419225/normal_6025c3fb5d67c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://lukegijabezul.rf.gd/mejewisux.pdf
    • http://vizeroxati.rf.gd/51948082667.pdf
    • http://wixesikive.epizy.com/luliluxamezewadik.pdf
    • http://lumosaneja.onlinewebshop.net/pes_manual_usmc_2018.pdf
    • http://zozasozam.epizy.com/rebar.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011dfb.bin
55c456a10d2d3e15cbd53fd078075b9a33953ef785033a30171450f250716bfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DFB 5356 bytes
font_01_sfnt_off0001301c.bin
21add6f8ffb33a82da3cd6d85e9196c8a344db547ead02ced42a45d8864bcb25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1301C 10832 bytes
font_02_sfnt_off000154e0.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x154E0 4324 bytes

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