Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2c3afc799984a60…

MALICIOUS

PDF

48.9 KB Created: 2021-06-03 14:33:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 9a33be24f4178ff0cd595716d24cac35 SHA-1: 98649044073b463e331aec7eeadc827048b1e202 SHA-256: c2c3afc799984a6053afa61b2ee2a5fc394fb111a1cd712476e5e4bacfcde41b
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free Robux'. The document also includes a lure to copy/paste content into a shell, suggesting an attempt to trick the user into executing commands. The primary malicious activity observed is the redirection to a known malicious URL, likely to download a secondary payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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-robux-place-game-hack In PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-hack-online-without-human-verification_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-free-fire_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/united-gaming-net-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/hacks-roblox_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/i-cant-get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-heaven-links_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-time-hack-2021_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-apk-mod-free-download_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-spin-coin_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-free-spin-link-twitter_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/minecraft-build-hacks_GM479516143.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_off000054b0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54B0 26656 bytes
SHA-256: fecf89ee7582ae25b22c6733df1c1d02a4ef46cdbddc1caeb751d3b96e9e2a9e
font_01_sfnt_off000091f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91F1 2912 bytes
SHA-256: fa76cc2dab30b56d5305de71ce949b6adffd6580af2f26905a33966a3200adbb
font_02_sfnt_off00009bed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BED 18472 bytes
SHA-256: a8315d3de564ce67f995c8887965c7d9f34366905f839248eafe88b792a59691

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