Malicious PDF — malware analysis report

Static analysis result for SHA-256 47e61d4e332f45a0…

MALICIOUS

PDF

83.5 KB Created: 2021-09-02 05:35:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 7b5d64d1304bf7ffd2cfa57968fcffe2 SHA-1: 205ace6e6814c5fa64d298591a644dd3e310d321 SHA-256: 47e61d4e332f45a0352f074db5b4b650a9fa0c0127be8db156987c969005176c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file contains embedded JavaScript, a common technique for executing malicious code within PDFs. It also features a link farm pointing to multiple domains, many of which appear to be compromised or disposable hosting, suggesting an attempt to obscure the final malicious destination. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates a phishing or trojan delivery intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://www.kindspring.org/inc/ckfinder/userfiles/files/71016063342.pdf In PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/f4rjuam47ch2nk1tbb5k9nb3e4/71033706666.pdfIn PDF document text
    • http://daieimotors.com/js/upload/files/29164486384.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160aa01bc7923b---84424092676.pdfIn PDF document text
    • https://songhong-thudo.com/img/files/dizamajanamelij.pdfIn PDF document text
    • https://ewdel.cz/ckfinder/userfiles/files/45556133388.pdfIn PDF document text
    • http://davidlbrooks.com/clients/868292/File/99927697790.pdfIn PDF document text
    • http://mnarch.it/userfiles/files/nupawuw.pdfIn PDF document text
    • http://ulv-fogger.ru/d/files/88439207934.pdfIn PDF document text
    • https://renfrewareahealthvillage.ca/ckfinder/userfiles/files/bomosu.pdfIn PDF document text
    • https://mallorcaboom.com/res/wysiwyg/file/73239992454.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa342db748---wefukujotegususomagam.pdfIn PDF document text
    • https://paroles-vives.com/ckfinder/userfiles/files/bomabuleju.pdfIn PDF document text
    • https://saleskerala.com/ckfinder/userfiles/files/64758239223.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a1fa7bd563---ravifesaduwogofunabimevew.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/85981453763.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/27177019377.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160f30b9569f33---subasawuxim.pdfIn PDF document text
    • https://baptistfriends.org/media/fagimox.pdfIn PDF document text
    • http://kleinschadenexperte.com/userfiles/file/gegineforezagazotozur.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607458919cf11---nisoperesagawedizudur.pdfIn PDF document text
    • https://www.premiumtrade.ro/ckfinder/userfiles/files/71160648885.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=the+color+purple+full+movie+freePDF link annotation
    • 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_off0000e30d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE30D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB24 10340 bytes
SHA-256: 533e022357251b3952eb33f39dd455c441a37fa1486b4d54f21f3080eb336da3
font_02_sfnt_off00011270.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11270 17924 bytes
SHA-256: 8153162b805dff0a78acaabb05dc3d933eea458c03c03b76f4c7080e4eae1a19

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