Malicious PDF — malware analysis report

Static analysis result for SHA-256 e094634fe770b9c5…

MALICIOUS

PDF

43.2 KB Created: 2021-06-03 14:22:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: a5ff9e47dfc4ef52f66ebd90d2f059b4 SHA-1: 6c903cf435c624d961ba79c680b8d0c4749d6c01 SHA-256: e094634fe770b9c5272342d23655e3b969bd46e6134d668666cb9733fb83d972
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as 'free gifts' or 'game hacks'. The document body and embedded URLs suggest a lure for users to download a payload, likely leading to further malware infection. No scripts were extracted, but the presence of malicious links and the ML classifier output strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/406889139/free-gifts-coin-master-game-hack In PDF document text
    • http://pustaka.minangkabau.unand.ac.id/repository/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • http://pustaka.minangkabau.unand.ac.id/repository/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://pustaka.minangkabau.unand.ac.id/repository/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.minangkabau.unand.ac.id/repository/minecraft-server-free-trial_GM479516143.pdfIn PDF document text
    • http://pustaka.minangkabau.unand.ac.id/repository/coin-master-free-spins-link-2021-download_GM406889139.pdfIn PDF document text
    • http://pustaka.minangkabau.unand.ac.id/repository/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • http://pustaka.minangkabau.unand.ac.id/repository/roblox-games-with-free-radio_GM431946152.pdfIn PDF document text
    • http://pustaka.minangkabau.unand.ac.id/repository/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • http://pustaka.minangkabau.unand.ac.id/repository/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • http://pustaka.minangkabau.unand.ac.id/repository/coin-master-card-collection-hack-apk_GM406889139.pdfIn PDF document text
    • http://pustaka.minangkabau.unand.ac.id/repository/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://pustaka.minangkabau.unand.ac.id/repository/mcpe_GM479516143.pdfIn PDF document text
    • http://pustaka.minangkabau.unand.ac.id/repository/robux-generator-that-works_GM431946152.pdfIn PDF document text
    • http://pustaka.minangkabau.unand.ac.id/repository/robuxglobalcom-no-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.minangkabau.unand.ac.id/repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://pustaka.minangkabau.unand.ac.id/repository/free-robux-hack-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://pustaka.minangkabau.unand.ac.id/repository/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.minangkabau.unand.ac.id/repository/free-roblox-script-executor_GM431946152.pdfIn PDF document text
    • http://pustaka.minangkabau.unand.ac.id/repository/free-roblox-clothes-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.minangkabau.unand.ac.id/repository/how-long-is-the-minecraft-free-trial_GM479516143.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_off00005048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5048 25000 bytes
SHA-256: 3cb15595e97f9d6ad1a113eff1524d8f3dbd4a1d42c7296ce1210ce9ac6d39ea
font_01_sfnt_off000087f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87F8 17712 bytes
SHA-256: 982f424818d2cc6c65a12e1040d006be3e19cba50bc69db2ca0f75fa75a43871

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