Malicious PDF — malware analysis report

Static analysis result for SHA-256 27e47f6becca6eea…

MALICIOUS

PDF

80.2 KB Created: 2021-09-27 06:38:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6299745ba8143a65bea577cc913373db SHA-1: a0d8d9b78a153cb3432927fc05274ebe1f510823 SHA-256: 27e47f6becca6eeab7cc7405ac17df08c4632d92eb1fa3418b82631bcf0d00c5
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection to these external sites, which are characteristic of phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://carnow.jp/js/upload/files/45555738536.pdf In PDF document text
    • https://lanhcongnghiepthinhphat.com/upload/files/bujovolorur.pdfIn PDF document text
    • http://zespolbahamas.pl/zdjecia/file/mujodidaxeledixusuzutome.pdfIn PDF document text
    • https://linkevicius.com/upload/galery/file/21589871673.pdfIn PDF document text
    • http://talleresjpg.es/img/file/bikujujapokodutamaxatusev.pdfIn PDF document text
    • https://slotsonline.ro/app/webroot/files/userfiles/files/tamosixinebubu.pdfIn PDF document text
    • http://interface-referencement.com/userfiles/file/38695425570.pdfIn PDF document text
    • https://safarekhoob.ir/basefile/safarekhoobir/files/15677911551.pdfIn PDF document text
    • http://tehpromyar.ru/media/file/99021876125.pdfIn PDF document text
    • http://kantoromega.pl/userfiles/file/48389592923.pdfIn PDF document text
    • https://www.kindspring.org/inc/ckfinder/userfiles/files/jumalomalaxuduz.pdfIn PDF document text
    • http://kondicionery-pushkino.ru/upload_picture/file/ratobupapigifefasaparizi.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/7fda548b1660cec1f815f5692193a9a0/ravewi.pdfIn PDF document text
    • https://legouic-peinture.fr/userfiles/file/puxasidobizikosevewe.pdfIn PDF document text
    • http://naturallabs.fr/userfiles/file/59521860812.pdfIn PDF document text
    • http://acsalma.hu/userfiles/files/zevawoma.pdfIn PDF document text
    • http://investbuild.ru/var/upload/file/5781954576.pdfIn PDF document text
    • http://marinaxaraes.com.br/ckfinder/userfiles/files/82682053817.pdfIn PDF document text
    • https://redac.ch/upload/94724923284.pdfIn PDF document text
    • https://chongtham68.com/app/webroot/uploads/files/wotozeloxe.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/74376071985.pdfIn PDF document text
    • https://autoradiator.mn/uploads/ckfinder/files/66957282074.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=fifty+shades+of+darker+full+movie+2017PDF link annotation
    • http://cluster006.ovh.net/~greeters/be/ckfinder/userfiles/files/zaruxetamubo.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_off0000c5b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5B1 11208 bytes
SHA-256: 3b368bd2a7ace2eeb4514b9db51859128426b8563018b8fa3b11d605e41fe3e1
font_01_sfnt_off0000e01c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE01C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f82e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF82E 22960 bytes
SHA-256: 9140dcf7b1d94ab8cc9ef1fe05a9c9959e828ac3d3d4ffd533a958ce82a23eab

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