Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a2087a6a2ba417b…

MALICIOUS

PDF

80.0 KB Created: 2021-09-19 00:46:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c96dce1c36d4e29573272fd160a172d3 SHA-1: f0e995adf344300f4e949798337fa23adb6eec17 SHA-256: 9a2087a6a2ba417bf6ce69962d82f58590840b0e5872cb85443da43086685657
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains embedded JavaScript and a link farm pointing to compromised websites, suggesting an attempt to trick users into downloading further malicious content. The presence of a visual download button further supports a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 8

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://photopoligrafic.ru/ckfinder/userfiles/files/metiduninigepowuk.pdf
    • http://kengosushionlineorder.com/uploads/files/pozazimujefixedigo.pdf
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/16136295065ea0---bunufitedugazat.pdf
    • http://goldenteriyaki.com/uploads/files/wimomanivamezozuk.pdf
    • https://llibreriaha.com/img/events/file/13576827475.pdf
    • http://glavis.biz/userfiles/file/kibaradevaroxinovixo.pdf
    • https://isigakizima.net/img/tmp/file/dovalor.pdf
    • https://giridhareye.org/ckfinder/userfiles/files/bimepelujulibomabosutones.pdf
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/c9c2f305db8c0a49cbeb3cd18dd2ed90/50898990469.pdf
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/a0octme8h9188f6eqs2e701rt1/90719185869.pdf
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614110035e798---15800101481.pdf
    • https://www.educazionesessuale-scuola.ch/ck/ckfinder/userfiles/files/82018853724.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144eb388705e---wovufi.pdf
    • https://palcev.ru/userfiles/file/50582658657.pdf
    • http://krzysztofmalec.pl/gfx/fck/file/timubupenigiwuxixili.pdf
    • http://tootingtaxi.com/survey/userfiles/files/vilupudawi.pdf
    • http://shopcloud.cloud/ckfinder/userfiles/files/25928923678.pdf
    • http://el-master.ru/userfiles/file/2307636186.pdf
    • http://eschool365.in/js/admin/uploadfiles/file/woperubojifiragaboruj.pdf
    • http://hyundai-dongdo.vn/images/files/xuwuvikomonotafuwezaja.pdf
    • http://www.libroparlatolions.it/backoffice/ckfinder/userfiles/files/92157102272.pdf
    • http://itagqatar.zajeltel.com/itag/file/files/1707652695.pdf
    • http://gestaocipa.com/public_html/Imagens/file/diwuxuzom.pdf
    • https://www.shamshabaddiocese.org/files/js/ckfinder/userfiles/files/naribukitevavela.pdf
    • http://hylimusic.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/bubokoranikukawejuka.pdf
    • https://www.stnedu.com/ckfinder/upload/files/52655765088.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=gta+v+download+apk+obb+file
    • 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_off0000d314.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD314 16792 bytes
font_01_sfnt_off0000eb2b.bin
9102f3753eb5236b0c69cf3015c44a6844a91e2ca9e7a8d8fa0e9fc5860e7b3f
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2B 10644 bytes
font_02_sfnt_off00010379.bin
e3bfff899808fad8a19c432aa59e5a0b66500cbd425d1a013220f5bf3bc8dd4b
pdf-font-stream PDF embedded font (sfnt) at offset 0x10379 18044 bytes