Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad12cefb74003a41…

MALICIOUS

PDF

43.1 KB Created: 2021-06-03 20:12:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: f9f49b003fe54ffd74b0b07fb3f2d5bc SHA-1: c83118c55ef2848c5c20b297008c39a9355c6812 SHA-256: ad12cefb74003a410880332bca4bea52cd4252f59e9db61baf6ed78d287aff30
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically advertising a 'game hack' or 'free generator'. The document body, though partially garbled, contains a URL that aligns with the heuristic findings of a malicious redirector. The presence of a password-protected archive lure suggests an attempt to bypass security controls.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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.online/app/406889139/app-for-free-spins-on-coin-master-game-hack In PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-minecraft-skins-xbox-one_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/android-coin-master-3433-apk-hack_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/minecraft-maps-pe-free-download_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-gang_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/whats-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/minecraft-apk-114-4_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-hack-roblox-passwords_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-free-spins-link-2021-april_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-robux-mod_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-free-raid-link_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-lawsuit_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-get-robux-for-free-2021_GM431946152.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_004_off00004f3a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F3A 24320 bytes
SHA-256: 57224ff2129839b015416747d7eef22d3ef712c65f1da1a52a905549ecedcb25
font_01_sfnt_off00008702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8702 17884 bytes
SHA-256: dc6c70fafb51a78ef12f4086d2953ccfccc8a264293bd4053977bb356e74e192

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