Malicious PDF — malware analysis report

Static analysis result for SHA-256 452db6769e9715a7…

MALICIOUS

PDF

43.2 KB Created: 2021-05-15 04:05:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a27ed10b14118d111d83faf90900b5c2 SHA-1: 4ef5fffbc1b08434942fde8b1949418f3f8fdd71 SHA-256: 452db6769e9715a73a0a454b15a7c2752e9e7e83c2da2d34c2239f10ff95b102
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links disguised as generators or hacks for popular games, such as Robux and Coin Master. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, and the 'PDF_GAME_HACK_REDIRECT_LURE' confirms the deceptive nature of these links. The document body explicitly mentions 'Gain Robux' and 'CLICK HERE TO ACCESS ROBLOX GENERATOR', reinforcing the lure. The primary URL, https://netcdn.xyz/app/431946152/gain-robux-game-hack, is likely the malicious destination.

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/gain-robux-game-hack PDF link annotation
    • http://oddgraphic.com/images/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://oddgraphic.com/images/games-in-roblox-that-give-you-robux_GM431946152.pdfIn PDF document text
    • http://oddgraphic.com/images/free-spins-coin-master-links-thursday-november-28-2021_GM406889139.pdfIn PDF document text
    • http://oddgraphic.com/images/coin-master-gold-cards-free-2021_GM406889139.pdfIn PDF document text
    • http://oddgraphic.com/images/coin-master-fun-free-spins_GM406889139.pdfIn PDF document text
    • http://oddgraphic.com/images/free-domain-for-minecraft-server_GM479516143.pdfIn PDF document text
    • http://oddgraphic.com/images/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • http://oddgraphic.com/images/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://oddgraphic.com/images/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://oddgraphic.com/images/roblox-g_GM431946152.pdfIn PDF document text
    • http://oddgraphic.com/images/free-script-executor-roblox_GM431946152.pdfIn PDF document text
    • http://oddgraphic.com/images/daily-free-spin-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://oddgraphic.com/images/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://oddgraphic.com/images/wurst-hacks_GM479516143.pdfIn PDF document text
    • http://oddgraphic.com/images/500-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://oddgraphic.com/images/coin-master-hack-2021-download_GM406889139.pdfIn PDF document text
    • http://oddgraphic.com/images/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://oddgraphic.com/images/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • http://oddgraphic.com/images/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • http://oddgraphic.com/images/minecraft-pocket-edition-hack_GM479516143.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_off000049df.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49DF 26288 bytes
SHA-256: 5ff12c8d2a204569ed41f96f3748522e3c4717c639ea0fd9b6204e6d233ad8b5
font_01_sfnt_off000086e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86E2 18200 bytes
SHA-256: 43fcfc5ad65bddb23c39a51770cc0f9a79752509534f161ef5bee49844d3e761

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