Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dd51b2b08d1b53c…

MALICIOUS

PDF

35.9 KB Created: 2021-07-05 15:10:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 36ffedcf7fcdd188f9190d8a8e165315 SHA-1: b5e04980086d28f310852e88abd949e05929bc76 SHA-256: 1dd51b2b08d1b53c0a9a309bef340c634b48d1c6bcda6e5a2e51da5a6303cb90
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links, including one pointing to a known malicious redirector infrastructure at 'http://netcdn.tw/app/406889139/hackear-coin-master-sin-root-game-hack'. The document body and heuristics indicate a lure for game hacks or generators, suggesting the intent is to trick users into downloading a malicious payload. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/hackear-coin-master-sin-root-game-hack In PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-cheats-and-hacks_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-spin-coin-master-instagram_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-robux-survey_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-minecraft-java-server_GM479516143.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-free-spins-and-coins-app_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/roblox-free-model-viruses_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/minecraft-logo-maker-free_GM479516143.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-hack-apk-july-2021_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-executor-roblox_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/roblox-hack-ga_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_002_off000035ef.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35EF 23460 bytes
SHA-256: 26dfd610553c3af59919ca22f8b46cb6435306a93f63e0bbec94e79e27443512
font_01_sfnt_off00006a5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A5E 18004 bytes
SHA-256: 08624150e58758f406cd174736f937a82fb2a2167488774787474989852631aa

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