Malicious PDF — malware analysis report

Static analysis result for SHA-256 363df2bf69455fd9…

MALICIOUS

PDF

45.9 KB Created: 2021-04-28 02:32:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: fb154dfec263652659197f44c91c45eb SHA-1: 821f6ef55e78cadb0f3eee26dd04feee5ec0e5bf SHA-256: 363df2bf69455fd9ae8eef2414402bcb24a7481a3708764bb6895659540f4520
162 Risk Score

Malware Insights

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

The PDF document contains multiple lures related to game hacks and free generators, impersonating the Facebook brand to encourage clicks on malicious URLs. The primary malicious URL identified is https://netcdn.xyz/app/431946152/launcher-hack-dinosaur-sim-roblox-game-hack, which is likely a redirector to a phishing page or a malware download. The document also provides instructions for password-protected archives, a common tactic to bypass security scans.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9776

Heuristics 6

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/431946152/launcher-hack-dinosaur-sim-roblox-game-hack.
  • 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/431946152/launcher-hack-dinosaur-sim-roblox-game-hack PDF link annotation
    • http://www.saburai.ac.id/elibrary//repository/does-getting-1-million-robux-for-free-work.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-hacks-counterbloxrobloxofensibe.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/how-to-get-free-money-on-rocitizens-roblox.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-redeem-toy-codes-free.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/websites-to-hack-roblox-accounts.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-obby-gives-you-free-robux-july-no-password-2021.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/exploring-free-rs-roblox.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/break-free-song-id-roblox.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/free-hair-roblox-hack.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/cheat-roblox-apres-la-dernire-mise--jour.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004345.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4345 28948 bytes
SHA-256: f43d5e6f01602ce10710e19ade809470fae4197aeb637434e5589368ccd7ef4c
font_01_sfnt_off0000843f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x843F 3312 bytes
SHA-256: 40bd8eebcb3a0d68a8646f1930e84f30a44bfa48525263c6c528f0bc1e9c1677
font_02_sfnt_off00008f8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F8F 19036 bytes
SHA-256: ed6b337972baac2165dec4d4b58bf3e220897ed4ced6ed80cd9f795762b910d3

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