Malicious PDF — malware analysis report

Static analysis result for SHA-256 eae15a03736da234…

MALICIOUS

PDF

76.7 KB Created: 2021-09-19 01:50:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 26944f4e1664fa22bbc113350c802a6d SHA-1: b7fa3ed287b30c5539ecfe76473461e4af3b2028 SHA-256: eae15a03736da2349dc2ab9ebb431e924c3479c68a4bf9765ccb6a524297c3db
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple URLs pointing to compromised WordPress sites, indicating an attempt to host and distribute malicious files. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via a link farm. The embedded JavaScript is likely used to facilitate the download or execution of further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f034bdd1d1---66398019443.pdf In PDF document text
    • http://www.ettermanenterprises.com/ckfinder/userfiles/files/70105784960.pdfIn PDF document text
    • https://lecourbe.dk/userfiles/file/lazewef.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/851d35237c26a7a7f19253787f9125c9/xupegegowekimot.pdfIn PDF document text
    • http://nhatrangpalacehotel.com/app/webroot/upload/files/matasasageruse.pdfIn PDF document text
    • https://satesayap.com/contents/files/43773060760.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132d58035bb2---jojevudutod.pdfIn PDF document text
    • http://auto4-spb.ru/public/images/ckfinder/files/zunizew.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613efe3146e75---gebozizezetazejixobo.pdfIn PDF document text
    • http://xn--90aoaidn.xn--p1ai/ckfinder/userfiles/files/6916248566.pdfIn PDF document text
    • http://nhatnguyen.vn/media/ftp/file/kowobex.pdfIn PDF document text
    • https://pasationtravellers.com/root/FCKeditor/file/kidawupupogidikote.pdfIn PDF document text
    • http://parvazyab.net/basefile/api203/files/wijufinomafesubikamotosu.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/cbb76d44ca821fb2d88604800bdce55e/5927894097.pdfIn PDF document text
    • http://doubles301.jp/files/ckeditor/files/71448631584.pdfIn PDF document text
    • http://rustproofingottawa.com/userfiles/file/57031896226.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/0islvap7piuii3ie0jsbhv966d/mizatewibapowuzaloka.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/fo2rt28duu77iusoo681sk7b17/fanofujogutotoxujorupevol.pdfIn PDF document text
    • http://seosanhrd.com/userfiles/file/gupokofuwatabedip.pdfIn PDF document text
    • http://nextgenship.net/upload/file/20210906163088857421.pdfIn PDF document text
    • https://chinatupai.com/web/js/ckfinder/userfiles/files/gujuvos.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=opc+ua+androidPDF 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_off0000ca04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA04 17476 bytes
SHA-256: f5090193c5130179e577409970cf7ebad8179eaa6288635e4751aacd57d80d6e
font_01_sfnt_off0000f6f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F5 10188 bytes
SHA-256: b0a456cd73960baf866399e2a81d2f4f5db8971f902eb77b315ad8b249419c77
font_02_sfnt_off00010dd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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