Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf0d7ddcace2c48c…

MALICIOUS

PDF

47.9 KB Created: 2021-06-03 20:19:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: aa768cd78b79ccd9ee584f6fc2230a57 SHA-1: 939c8886fb926683157847bcffbc2b5a27ef66d4 SHA-256: bf0d7ddcace2c48c83c4fcea2dc9e3aad906f08db036eaf25a638b8ae11a3791
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-risk heuristic indicating it links to a game hack lure, specifically targeting 'Coin Master'. The embedded URL points to a domain commonly associated with malware distribution. The document body, though partially corrupted, contains text related to game hacks and the malicious URL, reinforcing the lure. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.online/app/406889139/coin-master-hack-unlimited-spins-apk-download-game-hack PDF link annotation
    • http://www.library.gkigadingserpong.org/repository/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/game-hunters-coin-master_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-hack-ios_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/minecraft-windows-10-free-code_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-data-breach_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-minecraft-accounts-reddit_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-roblox-passwords_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/hacks-for-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-computer-hack_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-by-watching-ads_GM431946152.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_off00005318.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5318 24552 bytes
SHA-256: bd5a045c4c49865739d36a48a824bd60524e3c4fd1a8b4b949e48837e2a74fe0
font_01_sfnt_off00008ab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AB4 3380 bytes
SHA-256: cb8371cc187c45116d0984119c2893dd3db0d7f7d568d007a419406e6ca9f389
font_02_sfnt_off000096a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96A1 18916 bytes
SHA-256: 36b5946d0fa01df03061b9872aea65f63cba93bccd0378a8f0b0329212d0019c

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