Malicious PDF — malware analysis report

Static analysis result for SHA-256 4981d6d9a5fa01c7…

MALICIOUS

PDF

68.8 KB Created: 2021-09-12 20:48:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: d1b28c5a33008d91a6e1bacea8c3c45f SHA-1: a3d58b61c539dc0a392a17d38cf28533847a0f37 SHA-256: 4981d6d9a5fa01c72115d78bcce493358b928549e0af700046991cbfe3ca4ee3
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3555

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.
  • 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 http://pietroquatriniarchitetto.eu/userfiles/files/xemivuzamisuzomojojo.pdf In PDF document text
    • http://dexgerm.com/data/file/userfiles/files/82590393747.pdfIn PDF document text
    • http://ottuk-e.org/userData/board/file/gigirujunotozonikoladag.pdfIn PDF document text
    • http://a1climbing.com/userfiles/files/43942749887.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/3bd06cfd9f99a1c4cc36bdbf6ada644a/21799671806.pdfIn PDF document text
    • https://bisnismedsos.com/userfiles/file/64319244268.pdfIn PDF document text
    • http://petrduchek.com/files/raxidifagiwokowavikosewe.pdfIn PDF document text
    • http://9275522-travel.com/userfiles/file/8317470727.pdfIn PDF document text
    • http://bfttacg.marketsearching.com/upload/files/18162556043.pdfIn PDF document text
    • http://mundori.com/js/ckfinder/userfiles/files/kigunotan.pdfIn PDF document text
    • http://vattuxaydunghl.com/userfiles/file/vuved.pdfIn PDF document text
    • http://dailitara.lt/bites/uploads/file/dubenefogatesamofatepugi.pdfIn PDF document text
    • http://tiramisu-o.com/yamituki-n/uploads/files/femovuxexikevowiroxulevi.pdfIn PDF document text
    • http://karaokejdi.com/ckfinder/core/connector/php/upload/files/radevenomox.pdfIn PDF document text
    • http://nfc-lampang.com/user_img/files/10759837904.pdfIn PDF document text
    • http://studiotecnicolari.it/userfiles/files/62108924590.pdfIn PDF document text
    • http://hzbmsj.net/images/upload/File/zuwajo.pdfIn PDF document text
    • http://kartywspomnien.pl/uploads/assets/file/nanewuwusajefevaje.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d60411ad53---kariwubivanul.pdfIn PDF document text
    • http://tofuyatogo.com/uploads/files/nonoman.pdfIn PDF document text
    • http://cannamelis.com/userfiles/file/93172205022.pdfIn PDF document text
    • https://aksukartela.com/images_upload/files/fenijudugaserewokilebenap.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/e23b722f9edc08df9420500db4ee9eba/29518126461.pdfIn PDF document text
    • https://vrrc.heart.net.tw/ckfinder/ckfiles/files/8545032062.pdfIn PDF document text
    • https://www.singaporemedicalclinic.com/ckfinder/userfiles/files/losazikusumetuloxeji.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=game+pass+games+for+androidPDF link annotation
    • http://crossfit28.com.s125853.gridserver.com/siteuploads/editorimg/file/fuxexarosarabolik.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c0f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0F8 17188 bytes
SHA-256: 5591f936c543b8ba22ab75831cda617f9205e30557154f4cb2ad6efb1f1be5fe
font_01_sfnt_off0000ed54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED54 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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