Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ac98bbf5a540f5b…

MALICIOUS

PDF

43.3 KB Created: 2021-05-17 01:33:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 6ec98bfb2e91ab8130da58bda9a2481e SHA-1: a9eb767bac3d11eb1d49d40c61da2c95142db9df SHA-256: 4ac98bbf5a540f5b9c333968c1532b9ba1e6f734856b50537705df5ad5cdc3f2
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to websites offering game hacks and generators, such as 'free robux' and 'coin master hack'. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and the embedded URLs strongly suggest a phishing or scam attempt. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, but the document's structure and content point towards a lure for malicious redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 5

  • 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.
  • 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.xyz/app/431946152/rbx-place-free-robux-game-hack PDF link annotation
    • https://camillesplace.org/images/how-to-get-free-cards-sets-for-coin-master_GM406889139.pdfIn PDF document text
    • https://camillesplace.org/images/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • https://camillesplace.org/images/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • https://camillesplace.org/images/appsmob-info-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://camillesplace.org/images/roblox-rewards-robux_GM431946152.pdfIn PDF document text
    • https://camillesplace.org/images/coin-master-online-hack-no-survey-no-password_GM406889139.pdfIn PDF document text
    • https://camillesplace.org/images/coin-master-free-spins-link-without-human-verification_GM406889139.pdfIn PDF document text
    • https://camillesplace.org/images/moonactive-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://camillesplace.org/images/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://camillesplace.org/images/coin-master-cheat-codes-free_GM406889139.pdfIn PDF document text
    • https://camillesplace.org/images/minecraft-ps3-free-download_GM479516143.pdfIn PDF document text
    • https://camillesplace.org/images/coin-master-hack-no-verification-no-signup_GM406889139.pdfIn PDF document text
    • https://camillesplace.org/images/roblox-promo-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://camillesplace.org/images/coin-master-free-spins-deutsch-download-ios-link_GM406889139.pdfIn PDF document text
    • https://camillesplace.org/images/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
    • https://camillesplace.org/images/free-roblox-hack_GM431946152.pdfIn PDF document text
    • https://camillesplace.org/images/coin-master-hack-online-no-human-verification_GM406889139.pdfIn PDF document text
    • https://camillesplace.org/images/free-minecraft-java-edition-account_GM479516143.pdfIn PDF document text
    • https://camillesplace.org/images/coin-master-hack-download-android_GM406889139.pdfIn PDF document text
    • https://camillesplace.org/images/apk-coin-master-hack_GM406889139.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_003_off000047d0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47D0 27652 bytes
SHA-256: 810defaea5253668f16cd7db2cf4c4717e9ddef5f9852cfb953b25eec53f8fb3
font_01_sfnt_off000086a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86A0 18472 bytes
SHA-256: 30b20ae3df441f067d6970d2fc85ed95190924e4fa28fb295b294374bf1be820

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