Malicious PDF — malware analysis report

Static analysis result for SHA-256 24e7e815e7e1879d…

MALICIOUS

PDF

100.5 KB Created: 2021-08-08 14:00:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1ed21aba2cfe35a9ad9eaae64021539a SHA-1: 2771095f7cc3b709db7ba2bd61bba713043bee67 SHA-256: 24e7e815e7e1879dfeaeb074f10954acfd89f244a9cd4041c6e790b1fb373473
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, likely intended to lure users into downloading further malware or engaging in phishing. The presence of a download button heuristic further supports this malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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 https://ajitcoatings.com/uploads/voloru.pdf In PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/a167c98452dc21fc95caaf4361b932ce/16583599590.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/xavivugiv.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606d39e6ee82f---pabazuzanafemipulup.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609f7950ead43---3781553055.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/84b6861cf51a3f4071ff8034140e94a3/kudivisejib.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160df9867c1ce6---13198830712.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/9l866oovnvj1budngrtotfmirc/96851928045.pdfIn PDF document text
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/zanadejeda.pdfIn PDF document text
    • http://marta-galan.com/files/varios/file/99042791974.pdfIn PDF document text
    • http://jakpaisanestate.com/images/upload/files/25140875722.pdfIn PDF document text
    • https://allianztc.ro/files/file/17861268724.pdfIn PDF document text
    • http://hopkinshigh1988.com/clients/75739/File/56152003995.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160948127d6f09.pdfIn PDF document text
    • http://willbramephotography.com/gegutelolel.pdfIn PDF document text
    • http://chromowane.com/userfiles/file/ditovupisefadovukub.pdfIn PDF document text
    • https://aedwea.com/upload/foto/rodebaku.pdfIn PDF document text
    • http://carrollcountylawyers.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wewavikizazeb.pdfIn PDF document text
    • http://gruppocaminiti.it/userfiles/files/92792257537.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/bf4153466b3f8d6b9e851a2e4622954e/rivogilojulu.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/gomci2ss5v740ajubud48ugml6/sakalarujoxuzuvovozogon.pdfIn PDF document text
    • http://josephpowellfamilyreunion.com/clients/0/04/04c15d356d3082020e114f8c0300f46e/File/9997052215.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da1d8171602---51994622566.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/riduriwokuvolutegabek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=doulci+icloud+unlocking+tool+2019PDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E6 10636 bytes
SHA-256: 2b8c433268bba46ce168da86f99b03c1b3ab3499a5a89978c296d4e1146975d3
font_01_sfnt_off00010f2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F2B 16116 bytes
SHA-256: 74ea40c6abafff908ba0a862ebf25ee1d47d31f530ca964bdc695191fb21b084
font_02_sfnt_off0001247f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1247F 24108 bytes
SHA-256: d2a04830cac4c9799616160300791ac8baccc42aa34048a7f92062e9d9b61b1d
font_03_sfnt_off000160aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off000178b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x178B7 1680 bytes
SHA-256: 6c08887b596ecb472c5a0482df8c2f828d83fc5b5d16111ed0caa1fced1b35dc

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