Malicious PDF — malware analysis report

Static analysis result for SHA-256 d23d9e209c492ceb…

MALICIOUS

PDF

76.3 KB Created: 2021-09-19 11:04:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 456a43623e3de6c6cf07e066141f9a99 SHA-1: 3503527665900c6fe88c91745f764e9923e9edee SHA-256: d23d9e209c492ceb611bba522caa16dc11ef3339aaadb9dbc5083c62f85c0087
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple domains, some of which appear to be compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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.
  • 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 http://sandlnae.com/data/editor/file/65289588935.pdf In PDF document text
    • http://sudeoksa.org/userfiles/file/20210916214843.pdfIn PDF document text
    • http://mmprogetti.it/userfiles/files/56837367597.pdfIn PDF document text
    • http://saharun.org/uploads/ckfinder/userfiles/files/delojisesedubi.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/e5k1e60jo87bircfa1bh7ej560/14165446028.pdfIn PDF document text
    • http://launensia.cz/ckfinder/userfiles/files/zadadepe.pdfIn PDF document text
    • https://booknowrentalimo.ch/userfiles/files/40028703183.pdfIn PDF document text
    • http://crocepadrekolbe.it/userfiles/files/zujasovotevi.pdfIn PDF document text
    • http://trufeel.com/ckeditor/ckfinder/uploadfile/files/69274217207.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130f7102c252.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138aab154eec---fukivadanupawafoj.pdfIn PDF document text
    • https://southernwashpros.com/nbloom/fckuploads/file/75359249474.pdfIn PDF document text
    • http://gzlmjx.com/data/home/bxu2343160066/htdocs/uploadfile/files/68383161616.pdfIn PDF document text
    • http://rungrawin-itt.com/userfiles/files/78130547728.pdfIn PDF document text
    • https://willes-gb.com/uploads/files/202109090803214498.pdfIn PDF document text
    • http://weiddy.com/uploads/files/202109011447506275.pdfIn PDF document text
    • http://zeci.nl/im/image/32787922126.pdfIn PDF document text
    • http://suachuadienlanhhoaphat.com/hinhanh_fckeditor/file/dedetojitezu.pdfIn PDF document text
    • http://af.ssla.ru/images/fornews/files/vanezemupabuxatoz.pdfIn PDF document text
    • http://dagmar-e.de/userfiles/file/29501801355.pdfIn PDF document text
    • https://fruitssupplier.com/app/webroot/img/files/15648341184.pdfIn PDF document text
    • http://entrackintl.com/uploads/5241115503.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1612fe0053ce58---sebujaxe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=descargar+y2mate+apk+para+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_off0000c2f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2F4 11136 bytes
SHA-256: 2127888f88a779c4c4c9674dbb0c4e55bd67611804eb03f109d522e45ef1d228
font_01_sfnt_off0000dce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE9 17852 bytes
SHA-256: 55cbfe0beedc460fac3a31a75dc0615901980a2ef25e7e5ed5e2bd2d3e166fa2
font_02_sfnt_off00010b7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B7B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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