Malicious PDF — malware analysis report

Static analysis result for SHA-256 68d77e1efc21837f…

MALICIOUS

PDF

77.9 KB Created: 2021-08-29 00:20:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 9699324e9ceca91699cfeb16c91eaff8 SHA-1: 1fc0049bc12edcbd347473e2737edd7b267d1c57 SHA-256: 68d77e1efc21837fb6d557cea571cf28e7afcfa97d79346715b728aa0131aadd
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links pointing to external websites, many of which are hosted on compromised or disposable domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using numerous distinct hosts with a single link each, suggesting an attempt to manipulate search engine results or distribute malicious content. The embedded JavaScript likely facilitates the redirection or execution of further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • 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
  • 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://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/6b7baf688d56d7dfdab31b1b920b97af/18785124955.pdf In PDF document text
    • http://matchedtubes.de/userfiles/file/90766685800.pdfIn PDF document text
    • https://deepankarbasu.com/FCKeditor/file/zerabafadusikuk.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/57021662989.pdfIn PDF document text
    • https://prosaison.fr/userfiles/files/xuzefokefuvanijolud.pdfIn PDF document text
    • https://detmers-kontejner.hr/files/30346744900.pdfIn PDF document text
    • http://dreamcatcherltd.com/userfiles/file/98483823385.pdfIn PDF document text
    • http://zulassungsservice4you.de/bilder/file/bumexisiz.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160850416c6ed3---rafamaref.pdfIn PDF document text
    • http://biancoacolori.it/userfiles/files/82001251984.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/57342588715.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2e0d78066---dimawibexofux.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160f8a6f9187ae---74691560874.pdfIn PDF document text
    • http://sweetbasketsbyjackie.com/clients/864293/File/10683719737.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/4189c54328c45b222cd02d2ff6e03406/sodijigej.pdfIn PDF document text
    • https://coevent.ru/upload/files/zofigot.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/hmegs8plo86vadch7nfojpv89g/9317630711.pdfIn PDF document text
    • http://mashtalkandil.com/userfiles/file/88852124102.pdfIn PDF document text
    • https://yarpaket.ru/userfiles/file/wagejutuganavukubobub.pdfIn PDF document text
    • http://eldmsh1.ru/js/ckfinder/userfiles/files/bojewixasumuvup.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8c7d3297cb---92528520581.pdfIn PDF document text
    • https://adamant54.ru/userfiles/files/96965965347.pdfIn PDF document text
    • http://angelascanu.it/uploads/file/tudofura.pdfIn PDF document text
    • https://nanyangtextile.com/userfiles/file/fonuzawirowiwulakidata.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=speed+and+motion+worksheetPDF 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_off0000ca6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA6A 10864 bytes
SHA-256: f87adc4239b9661c9f56b965f0ce66fa93b1d8cc698648ed9191072cb9843eef
font_01_sfnt_off0000e35d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE35D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fb6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB6F 18024 bytes
SHA-256: 6a42b74b748da53f8ca435743a5e9e6a2bc356bd54d68cd2a36f59b5743d136b

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