Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa46899328f67cd4…

MALICIOUS

PDF

33.6 KB Created: 2021-07-06 03:59:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 04a13bbd12e5eed74a23eb4973d5656b SHA-1: b61e7a9e9286acda7b82d77a79f8d57d0fe09a12 SHA-256: fa46899328f67cd4e692a4115ccd10676e200b3e5d26fd66915ef1b246150474
122 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses a password-protected-archive lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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
  • 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 http://netcdn.tw/app/431946152/earn-free-robux-on-roblox-game-hack PDF link annotation
    • http://library.thamrin.ac.id/repository/how-to-get-free-admin-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/how-to-get-real-robux_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/microsoft-roblox_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/real-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/roblox-points_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-and-spin-link_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-roblox-tix-generator_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/real-robux-codes_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/how-to-hack-in-attrition-roblox_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/mcpe-master-hack-unlimited-coins-apk_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/roblox-hack-robux-2021-download_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-heaven_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/minecraft-launcher-download-free_GM479516143.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-robux-ml_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/download-coin-master-apk-hack_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
font_00_sfnt_off00002dd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DD4 22168 bytes
SHA-256: 5110b1233a2bb5013f229dab5dd28584e246b7a0b505215bf0a1a73f44dd4ae6
font_01_sfnt_off00005ee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE4 18788 bytes
SHA-256: af3555bc1f517b69886570aade67a9791766090da4e1e41d0d69d2926e00b478

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