Malicious PDF — malware analysis report

Static analysis result for SHA-256 e49ccb04dc1e38de…

MALICIOUS

PDF

166.1 KB Created: 2019-06-27 19:28:50 -04:00 Authoring application: PDFescape Online - https://www.pdfescape.com (via RAD PDF 3.19.2.2 - https://www.radpdf.com) First seen: 2021-05-29
MD5: 4a3f1a17c1411b1fe2facade5d30a541 SHA-1: ee8c16de8bc27ab2887e7ef43c22abd1d7fca8b2 SHA-256: e49ccb04dc1e38de9edace6b15dd4b6a9034401cd24fdbc258ab3a7535c89f00
222 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document utilizes an image-based lure, presenting a voicemail notification to trick the user into clicking a link. Embedded JavaScript and heuristics related to CVE-2023-26369 indicate the document is designed to exploit vulnerabilities and download a second-stage payload. The numerous URLs suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7297

Heuristics 7

  • TrueType bitmap font + active content — CVE-2023-26369 related high CVE related PDF_CVE_2023_26369_RELATED
    PDF embeds a TrueType font with bitmap tables (EBDT/sbix/CBDT) alongside exploit delivery indicators — CVE-2023-26369 exploits the sfac_GetSbitBitmap function in Adobe's libCoolType for arbitrary code execution. This CVE was actively exploited in the wild, but this rule does not validate the malformed EBLC/EBDT primitive.
  • ClamAV: Pdf.Phishing.Onedrive-9852983-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Onedrive-9852983-0
  • PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER
    PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 1 text block(s), carries a click-outward action, and is only 166 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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
  • 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://suspectgeneral.com/js/Office/office/voicemail/index.htm In PDF document text
    • https://www.shingle22j.com/wp-content/plugins/wordpress-seo/src/Office/office/voicemail/index.htmIn PDF document text
    • https://www.jandmautobody.com/wordpress/wp-includes/pomo/Office/office/voicemail/index.htmIn PDF document text
    • http://khachhang.obdvietnam.vn/web/Office/office/voicemail/index.htmIn PDF document text
    • https://atobarai.net//wp-includes/certificates/Office/office/voicemail/index.htmIn PDF document text
    • https://www.ajoyh.jp/wp/wp-content/plugins/hct/Office/office/voicemail/index.htmIn PDF document text
    • https://intersepter.in/.well-known/2021/Office/office/voicemail/index.htmIn PDF document text
    • https://www.radpdf.comIn PDF document text
    • https://www.radpdf.com)/Title(GenesisIn PDF document text
    • https://www.pdfescape.com)/Subject(GenesisIn PDF document text
    • http://www.dynaforms.comIn PDF document text
    • https://ferreous-stacks.000webhostapp.com/adfg/Office/Office/office/voicemail/index.htmPDF link annotation
    • http://www-ub.dev.joomlart.com/wp-content/plugins/meta-box/inc/Office/office/voicemail/index.htmIn PDF document text
    • https://www.pdfescape.comIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://purl.org/dc/elements/1.1/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://www.microsoft.com/typography/ctfontshttp://fontfabrik.comYouIn PDF document text
    • http://www.microsoft.com/typography/fonts/default.aspxIn PDF document text
    • http://crl.microsoft.com/pki/crl/products/MicrosoftTimeStampPCA.crl0XIn PDF document text
    • http://www.microsoft.com/pki/certs/MicrosoftTimeStampPCA.crt0In PDF document text
    • http://www.microsoft.com/pkiops/crl/MicCodSigPCA2011_2011-07-08.crl0aIn PDF document text
    • http://www.microsoft.com/pkiops/certs/MicCodSigPCA2011_2011-07-08.crt0In PDF document text
    • http://crl.microsoft.com/pki/crl/products/microsoftrootcert.crl0TIn PDF document text
    • http://www.microsoft.com/pki/certs/MicrosoftRootCert.crt0In PDF document text
    • http://crl.microsoft.com/pki/crl/products/MicRooCerAut2011_2011_03_22.crl0^In PDF document text
    • http://www.microsoft.com/pki/certs/MicRooCerAut2011_2011_03_22.crt0��In PDF document text
    • http://www.microsoft.com/pkiops/docs/primarycps.htm0@In PDF document text
    • http://www.microsoft.com/TypographyIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1719 6836 bytes
SHA-256: 1261aac4321ac9eb636dfa10f5af1f8454dc53b71b865c263b257bf05034b1cb
font_01_sfnt_off00002ad2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AD2 44868 bytes
SHA-256: 7ccdc54d4a5d2541bce8f1dee503ba323e5b4f52fe509013eec5ab87a8540bdc

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