Malicious PDF — malware analysis report

Static analysis result for SHA-256 e29b05826bf8b59b…

MALICIOUS

PDF

47.7 KB Created: 2021-06-09 07:26:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: e95a22b07187c1fb19fccb1e1287bb1f SHA-1: d318ab91f484a16a6a6851d5796e2f93a8a42860 SHA-256: e29b05826bf8b59bce81b46fdb6e72bbbb59c5d239efc6037fd5ce8dd9a2b4e8
200 Risk Score

Malware Insights

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

The PDF contains multiple links to redirector infrastructure, masquerading as game hacks and free item generators to lure users. One of the primary links, https://netcdn.tw/app/431946152/roblox-rocitizens-codes-for-free-items-game-hack, is identified as a malicious redirector and impersonates Amazon. The document's structure and embedded links suggest an attempt to exploit user interest in free in-game items to drive traffic to malicious sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.
  • 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.tw/app/431946152/roblox-rocitizens-codes-for-free-items-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
  • 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.tw/app/431946152/roblox-rocitizens-codes-for-free-items-game-hack In PDF document text
    • https://digilib.stieama.ac.id/repository/hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-gameplay_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-roblox-website_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-attack-hack_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/tiktok-free-watermark_GM835599320.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/is-minecraft-free_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-tricks_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/easy-roblox-today_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-hack-app_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_004_off000054cc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54CC 28380 bytes
SHA-256: 57ab1e70a81630f4d223e508f45b63e5cbb9691c3aa1d6b5c4e0c541885000d6
font_01_sfnt_off000096f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96F0 18688 bytes
SHA-256: 656f2eb28ccf8501f23780e5ad78742d55921a4dad9153871a99be71727656dc

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