Malicious PDF — malware analysis report

Static analysis result for SHA-256 eade9e9996504daa…

MALICIOUS

PDF

82.1 KB Created: 2021-09-19 17:10:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2f9c133e29bcfea5598c8677ecbc640b SHA-1: fca032ba2f3ec8b51107a46e4bb6269e455f6791 SHA-256: eade9e9996504daacd0dd045d5c78986b9303c6ca88933626b3e263f599f7e02
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for exploiting PDF vulnerabilities or redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7801

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.
  • 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
  • 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://synerhu.ru/uplcv?utm_term=bloxburg+cheap+house PDF link annotation
    • https://torgradio.ru/new/files/file/rutub.pdfIn PDF document text
    • http://kbautotech.com/board/datafiles/imagefile/tazofoxowafowulire.pdfIn PDF document text
    • https://crcnueva.naturasoftware.com/uploads/images/files/xakifeguvasusejuze.pdfIn PDF document text
    • http://iccj.jp/images/uploads/fckeditor/file/8349901776.pdfIn PDF document text
    • http://af.ssla.ru/images/fornews/files/fitujovibosuk.pdfIn PDF document text
    • https://wangwangcamp.com/uploads/files/202109010837507678.pdfIn PDF document text
    • http://elskup.pl/images/assets/file/66849169565.pdfIn PDF document text
    • http://solee56.com/ckfinder/userfiles/files/wedorojupezuka.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fd7520c2b4---tekuvobisilokitobigo.pdfIn PDF document text
    • https://dptech.vn/uploads/files/tajopijunitijeboxame.pdfIn PDF document text
    • http://artospace.com/pics/file/39304207159.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fbede87cc2---27000931606.pdfIn PDF document text
    • http://meuble-tunisie.com/userfiles/file/96442729643.pdfIn PDF document text
    • http://dintainoodle.com/uploads/files/93640525252.pdfIn PDF document text
    • https://tskrea.com/userfiles/file/gudugenisetalaxufok.pdfIn PDF document text
    • http://stensoproject.com/userfiles/files/foseborimiguxamelapiwilo.pdfIn PDF document text
    • http://azseal.net/uploads/userfiles/file/kubapidegomaso.pdfIn PDF document text
    • https://www.cifphosteleriayturismo.es/ckfinder/userfiles/files/xowiledapixubida.pdfIn PDF document text
    • https://xn--nmqu14inmf.com/upload/files/ravawafizu.pdfIn PDF document text
    • http://tacchigroup.com/public/thread/risorse/file/zuragemutiroxiniwawav.pdfIn PDF document text
    • http://www.artefuoricentro.it/js/lib/ckfinder/userfiles/files/zaxititawolero.pdfIn PDF document text
    • https://hamasataccessories.com/userfiles/files/33420957391.pdfIn PDF document text
    • http://lysfyyy.com/upload/files/20700346409.pdfIn PDF document text
    • https://conexusinternational.com/ckfinder/userfiles/file/56541382746.pdfIn PDF document text
    • http://hamdannepal.com/userfiles/file/gikilebavotivibenopepuxa.pdfIn 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_off0000f03b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF03B 10756 bytes
SHA-256: 13a48a65a36d4e94b825333c822c6d306cbc00a1d4c5452bf749715a1a162a33
font_01_sfnt_off000108f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108F3 16856 bytes
SHA-256: f8abaaa39c0ba11a199e9320280a92eb221fd10d6e765b5126db8f090a82cb28
font_02_sfnt_off000134e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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