Malicious PDF — malware analysis report

Static analysis result for SHA-256 b65795ff3b2bdef4…

MALICIOUS

PDF

80.5 KB Created: 2021-09-09 05:58:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 70e43f0f21c68f12f333408208ce551f SHA-1: 1a4c2231c932d1c5ff82e2eaed2bce0c2ed134c6 SHA-256: b65795ff3b2bdef413faaa821a9c892f432df3c1ee0021d273e617b3733536f7
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code or redirecting users. The presence of numerous external URLs, many of which are hosted on potentially disposable domains, suggests a link farm or phishing infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/161307e8547665---84735049326.pdf
    • http://daiichigroup.net/uploads/news_file/kuvozaxegafinogum.pdf
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613586421dca0---fodumexafirajimedam.pdf
    • http://ketnoikienthuc.com/upload/files/50168172184.pdf
    • http://dspec-car.com/js/upload/files/lakutanitamunoj.pdf
    • http://sabaispa.net/userfiles/file/pezolutugokubuvuj.pdf
    • https://airxps.com/userfiles/files/19673021877.pdf
    • https://apsco.ly/userfiles/files/noxidovaposigigasilonej.pdf
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/zumuvelawikadorakekevug.pdf
    • http://www.mezmat.ru/ckfinder/userfiles/files/butujizo.pdf
    • https://doucetplasticsurgery.com/ckfinder/userfiles/files/worejes.pdf
    • https://digireg.dk/upload/doxulejez.pdf
    • http://www.ciesol.com/ckfinder/userfiles/files/77964657730.pdf
    • https://xn--bankkrtya-41a.hu/js/ckfinder/userfiles/files/95964503187.pdf
    • http://1yunnan.com/ckfinder/userfiles/files/jubuxemi.pdf
    • http://halmar.info/userfiles/file/perirepazapimamizusoja.pdf
    • http://exosportsante.fr/ckfinder/userfiles/files/waninevakelodeboruxilutop.pdf
    • http://jinruily.com/UploadFile/file/20210908230452852.pdf
    • http://botaierpharm.com/upload/files/wosupotegerapew.pdf
    • http://yetisirkaucuk.com/firma/files/rajugorefuk.pdf
    • http://clingac.com/d/files/71447994293.pdf
    • http://smartdeal.pl/files/upload/files/63475244490.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=aplikasi+karaoke+di+android+gratis
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da35.bin
fe3dc51f1e55c3392b155b2bf8babb2d733c0e2e037012e40ed0d5b6aea619bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA35 10640 bytes
font_01_sfnt_off0000f281.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF281 16792 bytes
font_02_sfnt_off00010a93.bin
4e09681cbcdab46737d52e97a5cee701bc242511532452bbbe0900637b59e9f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A93 16432 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.