Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b56a070405d1e21…

MALICIOUS

PDF

48.8 KB Created: 2021-06-03 09:59:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: fde12fd00725e5cdbf811990e39162dc SHA-1: 40ad87a9bcd004357f14dd91fc50dcae041f6e08 SHA-256: 2b56a070405d1e211754536317effb344b310a749e33af737b4419e7555db498
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to a known malicious domain, masquerading as a game hack generator. The document body, though partially corrupted, contains the primary malicious URL. The presence of multiple redirector links and the ML classifier's high confidence score indicate a deliberate attempt to lead the user to a harmful site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 4

  • 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.
  • 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/431946152/free-roblox-pin-codes-game-hack In PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-get-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/bux-gg-robux-free_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/robux-free-co_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/coin-master-free_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/20210-free-spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/coin-master-daily-free-spins-link-app-download_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/roblox-inappropriate-games_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/appsmob-info-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/robux-free-2021_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/coin-master-hack-cheat-generator-d_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/coin-master-hack-apk-july-29_GM406889139.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_004_off00004dea.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DEA 30032 bytes
SHA-256: f1154ff9121a8b3ee108620daf2f204c05e712cb8c2892c2ef7c68b6365c5a4d
font_01_sfnt_off00009210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9210 2892 bytes
SHA-256: e0a0e7499c3dd10c5114bd1538d6e258e6cb3acdd4f79d9538668087a4bdd2cc
font_02_sfnt_off00009bf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BF9 18396 bytes
SHA-256: f52dc14ee7e448aa0f674abe902bf1c93ecce416da154576fb4a0807dea580f0

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