Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e99312ab49988b9…

MALICIOUS

PDF

45.2 KB Created: 2021-06-09 11:42:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 82f994349e5ff143d80cc188f700d4bf SHA-1: 1e70e3b9615201e199b7c45332cb765c09502ea4 SHA-256: 6e99312ab49988b9c45bbf16efd0315ef277894d6ae3f78fa9b461037c19fdb1
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF document contains numerous links to external websites, many of which are hosted on 'pourvosvacances.com' and appear to be part of a link farm designed to attract users searching for game hacks and free currency. The document body and heuristics indicate a lure for 'free Robux' or game hacks, directing users to potentially malicious sites. The presence of a clipboard command lure suggests an attempt to trick users into executing commands, further increasing the risk.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 7

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/how-to-get-free-robux-no-phone-number-game-hack PDF link annotation
    • http://pourvosvacances.com/images/20210-robux_GM431946152.pdfIn PDF document text
    • http://pourvosvacances.com/images/how-to-get-free-robux-easy-on-phone_GM431946152.pdfIn PDF document text
    • http://pourvosvacances.com/images/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pourvosvacances.com/images/coin-master-hacks-for-free-spins_GM406889139.pdfIn PDF document text
    • http://pourvosvacances.com/images/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://pourvosvacances.com/images/minecraft-pe-apk-download_GM479516143.pdfIn PDF document text
    • http://pourvosvacances.com/images/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pourvosvacances.com/images/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://pourvosvacances.com/images/roblox-skin-free_GM431946152.pdfIn PDF document text
    • http://pourvosvacances.com/images/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://pourvosvacances.com/images/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://pourvosvacances.com/images/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • http://pourvosvacances.com/images/free-robux-no-download-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://pourvosvacances.com/images/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://pourvosvacances.com/images/free-coin-app_GM406889139.pdfIn PDF document text
    • http://pourvosvacances.com/images/coin-master-free-spins-heaven_GM406889139.pdfIn PDF document text
    • http://pourvosvacances.com/images/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://pourvosvacances.com/images/roblox-local-player-script-hack_GM431946152.pdfIn PDF document text
    • http://pourvosvacances.com/images/70-free-robux_GM431946152.pdfIn PDF document text
    • http://pourvosvacances.com/images/get-me-robux-for-free_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_004_off00005124.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5124 25568 bytes
SHA-256: 6a9b42f6ccf98d2c2ffb5b7f58c51fe8ebf28dadd2e5a7b78ab66801197ada27
font_01_sfnt_off00008c94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C94 18864 bytes
SHA-256: 766e4a586d686caf1f38c35815549e0fb62e88ec3cca2efa464dad3d8440b03b

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