Malicious PDF — malware analysis report

Static analysis result for SHA-256 d254e9961158373b…

MALICIOUS

PDF

85.1 KB Created: 2021-09-21 12:25:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7f1f625f5c78b3eb492aa438cc0f72d3 SHA-1: cda0cfb2a65bf45a59c2f0d7efd5717d91294ecf SHA-256: d254e9961158373bc580df12da163d3ecf50361e3df0abcc324b63d14c520c9e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://sutinlawkrabi.com/ckfinder/userfiles/files/xefarimamusudidi.pdf In PDF document text
    • http://profil-metall.de/content/uploads/file/72480983412.pdfIn PDF document text
    • http://imcborivali.org/userfiles/file/32040237009.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140712e11e58---65356248625.pdfIn PDF document text
    • http://dunajecbiala.pl/upload/File/54838740185.pdfIn PDF document text
    • http://ranjitabiswas.com/userfiles/files/14839462432.pdfIn PDF document text
    • http://kamnitikamini.si/upload/files/67793181037.pdfIn PDF document text
    • http://nacyc.jp/Upload/file/farejaraliwazelipoko.pdfIn PDF document text
    • https://myclubowners.travelenvogue.com/userfiles/files/motodorogabupuvuteser.pdfIn PDF document text
    • https://xenang-mitsubishi.com/fckupload/file/gevetifo.pdfIn PDF document text
    • http://xn--12cmi2byac9cdhd0hra6d7bxkwbgj1gch.com/user_img/files/54912342247.pdfIn PDF document text
    • https://svltv.in/userfiles/files/julalilikufirilotux.pdfIn PDF document text
    • http://chronocertif.com/userfiles/file/kazikemeni.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/16140c4b807105---80734273802.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/gesuzedidadud.pdfIn PDF document text
    • http://videofilm-tv.ru/content/File/zamexakovuputero.pdfIn PDF document text
    • https://ladulceseguros.ar/noticias/fckeditor/file/94864342010.pdfIn PDF document text
    • http://highdesertrent.com/newsite/images/uploads/file/60934216787.pdfIn PDF document text
    • http://thermocomfort.ca/userfiles/file/gitatuvizenijosubunalan.pdfIn PDF document text
    • https://exihomes.com/userfiles/files/rukakibipezofefowogadoxib.pdfIn PDF document text
    • http://cablexconsulting.com/Upload/file/33243437174.pdfIn PDF document text
    • https://thepainter.asia/upload/files/dodidugakadi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=planetarium+app+androidPDF link annotation
    • http://alessandrotria.altervista.org/areap/ckfinder/userfiles/files/kewojebejesepaf.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e84f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE84F 18056 bytes
SHA-256: c806460211572273e633e96c08e3a70f256b5b5baf364b6f110fad6f981f1cd0
font_01_sfnt_off00011731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11731 10484 bytes
SHA-256: f8b03f2536c2d1d474cc813132a5015bfe4802dd7dabeea0c0e71e7abf0ef43e
font_02_sfnt_off00012ef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EF6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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