Malicious PDF — malware analysis report

Static analysis result for SHA-256 97f496cf146d3361…

MALICIOUS

PDF

42.0 KB Created: 2021-05-14 01:10:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: d6ea98c6f9824ed5d28846c76367b173 SHA-1: cc317055feb5ae0c195aebddcccd1827bab527a4 SHA-256: 97f496cf146d3361443f733aff087a563e05f7b78f0dba2713d8eeddedc3c7d4
162 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are structured as SEO-optimized PDF link farms. The document's content and embedded links suggest a lure for users seeking in-game currency or accounts, likely leading to malware or phishing sites. The ML classifier strongly flagged this PDF as malicious, and the presence of a 'recovery secret' lure further increases the risk.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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
  • 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://netcdn.xyz/app/406889139/free-coin-master-spins-and-coins-for-daily-game-hack PDF link annotation
    • http://shoruq.sch.ae/userfiles/files/hack-coin-master-download_GM406889139.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/roblox-e-free_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/coin-master-daily-free-coins-link-today_GM406889139.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/blox-rewards_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/free-pet-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/coin-master-hack-apk-iphone_GM406889139.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/download-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/coin-master-hack-tool-ios_GM406889139.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/how-to-duplicate-coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/how-to-change-your-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000475f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x475F 24948 bytes
SHA-256: 151a091842c13d3574a513b941af8db39e6b3155fc6ec3c72f651807dea9ddf0
font_01_sfnt_off00008117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8117 18480 bytes
SHA-256: 0d8a36892a593a52a07be53add068acf830a96b26d837b0e63e846bae8b7a7a5

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