Malicious PDF — malware analysis report

Static analysis result for SHA-256 53cc76c23be96356…

MALICIOUS

PDF

43.1 KB Created: 2021-06-03 23:55:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 16cbb3ec5fff02f022eb351b779841b8 SHA-1: 527449b4a407f5859436aa8b9cdcac3ea0e7c0b2 SHA-256: 53cc76c23be96356217b33e04d8b883d136803918d65a37f6e213eff08f488d7
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a high-confidence heuristic indicating it links to a game hack redirector, which is a common lure for malicious content. The embedded URL and document body text reinforce this, suggesting the primary goal is to trick the user into visiting a site that likely serves malware or phishing pages. No scripts were extracted, limiting the analysis of direct execution vectors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • 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.online/app/406889139/mcpe-master-coin-hack-apk-game-hack PDF link annotation
    • http://katalog.stikesmukla.ac.id/repository/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/how-to-get-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/robux-place-rewards_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/roblox-hacking-website_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/legit-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/roblox-troll-outfits-free_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/coin-master-date-and-time-hack_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/minecraft-free-edition_GM479516143.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/coin-master-free-spins-iphone-2021_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-robux-mod_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/get-coin-master-spins-free_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_004_off0000516e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x516E 23716 bytes
SHA-256: 427e50b721f6ac6e187012a81f86492b2adf8402b587b595ec330da4cc6175ea
font_01_sfnt_off00008716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8716 17892 bytes
SHA-256: df4699ad1f6ddac4a242edb3e57737628ee6aca47845cdea5c03b85425c35389

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