Malicious PDF — malware analysis report

Static analysis result for SHA-256 689fa8b63ff61c21…

MALICIOUS

PDF

156.5 KB Created: 2021-09-07 12:57:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: d90c429213bb151cb0f086ea6e1a3547 SHA-1: ed1a8ae446e002d805542692b520054b8534cc67 SHA-256: 689fa8b63ff61c218ee6097b5fc47f3f032a3ed3bb71ad9aa6fe7ff82f624d2f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of external URIs and the overall structure point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://swift-tw.com/lcc/upload/files/27869010370.pdf In PDF document text
    • https://camgloberealtor.com/userfiles/file/25477134705.pdfIn PDF document text
    • http://plnjl.com/userfiles/files/lipuzufezi.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/batewadofigumopesuvej.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4355ea1ca4---96356605056.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8dbac67e0---12822942676.pdfIn PDF document text
    • http://adbrf.com/files/fckeditor/file/519327376612ac4451642a.pdfIn PDF document text
    • http://ingmontagna.com/userfiles/files/wujubab.pdfIn PDF document text
    • http://allasclub.com/campannas/file/posetoderogaluxigew.pdfIn PDF document text
    • https://flyingfish-stay.com/userfiles/file/31389580770.pdfIn PDF document text
    • http://veoguidecostarica.com/ci/userfiles/files/44631701749.pdfIn PDF document text
    • http://cioccolatogallucci.it/userfiles/file/fawezowumeba.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1be626ed7f---82129234605.pdfIn PDF document text
    • http://asustainable.com/global/file/mujijiligokonogog.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/woboxitogofubizemi.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/88aab00fddadec29c6e721ebe3902b1e/78904466125.pdfIn PDF document text
    • http://mjsolankifoundation.com/fck/imagesfile/basumeserobenajiniduwoziw.pdfIn PDF document text
    • http://ydtmuhendislik.com/ckfinder/userfiles/files/fisuniv.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/begibuzuxa.pdfIn PDF document text
    • https://rumusjitu.com/contents//files/wavibu.pdfIn PDF document text
    • https://alajuusa.ee/media/contents/file/57972742408.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/1cpqqju09v0bn1qa3j60o88vu2/56522678726.pdfIn PDF document text
    • http://kyanite.tv/userfiles/file/sobovi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=inteligencia+artificial+fundamentos+pr%C3%A1ctica+y+aplicaciones+pdfPDF link annotation
    • 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_off0001f0b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F0B3 24180 bytes
SHA-256: 729680182f076aba25e20323ef074a6577d371bf92b7bfaabfce41e626562bd1
font_01_sfnt_off00022edf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22EDF 11308 bytes
SHA-256: 5e61678efbd1388f522c3ccc5cb45c80d1f077c77fe3fdf9624b531a3486343e
font_02_sfnt_off000248e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x248E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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