Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f0ba46617064599…

MALICIOUS

PDF

95.5 KB Created: 2021-07-13 22:54:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8e1f0fbc689601a2bd9e32d7c065acc0 SHA-1: 6b7192f3592c7a20ec7c7f10ac7ca77d7bb883e8 SHA-256: 2f0ba46617064599052510d5b6a4e0cc10ed9eafd9391874f2c02bfa890478df
172 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains embedded JavaScript and numerous links pointing to compromised WordPress upload storage and disposable hosting, suggesting an attempt to host malicious content or redirect users. The presence of a visual download button lure further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://jxloanchien.com/style/postimage/file/8332960503.pdf In PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/fd3d4a7bc95ed69fca304b9d5b5ae21c/49553529075.pdfIn PDF document text
    • http://cmtdental.com/upload/ckimg/files/mumuxepi.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1606f92cf2173a---perevexowabaliko.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/files/93603214538.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9056f0b581---bebalisudug.pdfIn PDF document text
    • http://usarsenal.it/userfiles/files/dodufezebanigow.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/0293b2ae5b0e0e1114a3e120d27a30d3/tibavizubusoxuvudu.pdfIn PDF document text
    • http://1137.jp/app/webroot/js/ckfinder/userfiles/files/tagemubexipojewubo.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/fubej.pdfIn PDF document text
    • http://kaupa.cz/userfiles/file/93740501609.pdfIn PDF document text
    • http://cuanhomkinhtoanthang.com/media/file/fanefudotedamazid.pdfIn PDF document text
    • https://marblobaths.com/app/webroot/img/files/zinuluvijajivibi.pdfIn PDF document text
    • http://cga82.com/admin/File/wodezixudesoka.pdfIn PDF document text
    • http://hncastlecable.com/d/files/10662009135.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/37776147095.pdfIn PDF document text
    • https://sce.tw/uploads/files/60caa4a785a3c.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad2e0d7ece---39737638675.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/dowununibulusux.pdfIn PDF document text
    • http://globaltruthmediagroup.com/clients/a/aa/aa8380eac451876ae6ab993bf3a720d6/File/43697661926.pdfIn PDF document text
    • https://yuanfuconstruction.com/ckfinder/upload/files/33782134682.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160925632b022a---80237904036.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=tamil+news+paper+pdf+download+todayPDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/e57683d7384a9215da3d039fafbf4b68/30889556019.pdfIn PDF document text
    • 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_off00011107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11107 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12919 17780 bytes
SHA-256: 35d15ae56338761de17d3febb02d4a659e3d518103ec94be5d8e576b47239b89
font_02_sfnt_off000157a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157A8 10824 bytes
SHA-256: 0de40d53f5ae0469218545a78d72105ea1e8a460a15fe75572e0d3f73898227d

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