Malicious PDF — malware analysis report

Static analysis result for SHA-256 da297aebccc30e5f…

MALICIOUS

PDF

82.4 KB Created: 2021-09-22 10:31:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b01e8186e577086cbdfdc63e764f9f52 SHA-1: aedb5c2f741f9cba4e23b087672f5af8a9c7adf1 SHA-256: da297aebccc30e5f3e9d9c7970d40f759c39ae7ff8c8a9458ecc2965779d0e9e
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample is a PDF document detected by ClamAV as Pdf.Phishing.Trojan. It contains embedded JavaScript and multiple links, some of which point to compromised WordPress upload storage and other disposable hosting. The presence of a visual download button lure further supports a phishing or social engineering attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://www.childofafrica.org/media/userfiles/file/36507765278.pdf In PDF document text
    • http://novo-foto.ru/ckfinder/userfiles/files/dopuwufilaterebafe.pdfIn PDF document text
    • https://www.traitagri-solutions-alternatives.fr/ckfinder/userfiles/files/71044608454.pdfIn PDF document text
    • http://trips-in.com/ckupload/files/2483828586.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/7b4d073258ab9b40de408574fd932623/golaximuxov.pdfIn PDF document text
    • http://sibzakon.ru/ckfinder/userfiles/files/vufesa.pdfIn PDF document text
    • http://shyjjc.com/v15/Upload/file/2021912116256821.pdfIn PDF document text
    • http://wingprocess.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/40660952687.pdfIn PDF document text
    • http://w-mill.jp/images/file/35854770088.pdfIn PDF document text
    • http://rama-sp.com/rama/webroot/js/ckfinder/userfiles/files/nozetamumirupinobunu.pdfIn PDF document text
    • https://crownprolaw.cn/userfiles/Proj_Name/files/rosax.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/051ml0s149m3k3er21e5lo6mv0/kezufagipawaruxiton.pdfIn PDF document text
    • http://svadbavmoskve.com/content/xuploadimages/file/lewalu.pdfIn PDF document text
    • http://caogenzhiben.com/filespath/files/20210916125340.pdfIn PDF document text
    • https://beyondpins.com/calisma2/files/uploads/farixefuwiriselep.pdfIn PDF document text
    • http://www.startbatteries.gr/ckeditor/ckfinder/userfiles/files/gusala.pdfIn PDF document text
    • http://rigdrilling.org/userfiles/file/betomarawokanujapofax.pdfIn PDF document text
    • https://www.hippocratio.gr/ckfinder/userfiles/files/61915616305.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/7c8f9557614e4e2488460c500fc15a41/37342305061.pdfIn PDF document text
    • http://3bbb.fr/ckeditor/upload/files/43408094428.pdfIn PDF document text
    • https://angem.fr/userfiles/file/707060129.pdfIn PDF document text
    • http://express-service-auto.fr/ckeditor/ckfinder/userfiles/files/62977441402.pdfIn PDF document text
    • https://sportsslife.net/upload/ckfinder/files/53617030148.pdfIn PDF document text
    • http://lamekatus.com/uploads/ckeditor/files/66871397530.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=dotx+file+viewerPDF link annotation
    • https://mediaget.com/userfiles/files/wejerunupiwis.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_off0000df1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF1F 10028 bytes
SHA-256: 06965ba46141f76e36eba850d3076c19c0f237e56d979539544ae1b03d16eb39
font_01_sfnt_off0000f589.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF589 17612 bytes
SHA-256: f462ad9e57f9a2e4372a2de213f46c7545e0c0080b4e02ede90689844d141afd
font_02_sfnt_off0001238d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1238D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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