Malicious PDF — malware analysis report

Static analysis result for SHA-256 a37c98e8fc61b52f…

MALICIOUS

PDF

34.4 KB Created: 2021-06-19 09:47:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 9ba54c57ed199cb3b11e5cc1d7e023ea SHA-1: 19cb2fc9d9731224f9b1b634863ecc553ce04fd1 SHA-256: a37c98e8fc61b52f04ff87b57b0b0718a5805ec45a4790a776b88aef635e8723
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a high-confidence heuristic identifying a lure related to 'free generator / game hack'. The primary URL, http://netcdn.co/app/431946152/roblox-jacket-free-game-hack, strongly suggests a social engineering tactic to trick users into downloading potentially malicious content. No scripts were extracted, but the document's structure and embedded links point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/roblox-jacket-free-game-hack PDF link annotation
    • http://ansacare.com/images/free-coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://ansacare.com/images/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://ansacare.com/images/roblox-lumber-tycoon-2-cheat-codes_GM431946152.pdfIn PDF document text
    • http://ansacare.com/images/roblox-hack-client-pc-download-aimbot_GM431946152.pdfIn PDF document text
    • http://ansacare.com/images/minecraft-hacks-115-2_GM479516143.pdfIn PDF document text
    • http://ansacare.com/images/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://ansacare.com/images/how-to-hack-into-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://ansacare.com/images/how-to-get-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://ansacare.com/images/hack-roblox-system48_GM431946152.pdfIn PDF document text
    • http://ansacare.com/images/how-to-be-a-hacker-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://ansacare.com/images/roblox-got-hacked-2021-video-and-evidence_GM431946152.pdfIn PDF document text
    • http://ansacare.com/images/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • http://ansacare.com/images/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://ansacare.com/images/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://ansacare.com/images/tiktok-free-followers-2021_GM835599320.pdfIn PDF document text
    • http://ansacare.com/images/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://ansacare.com/images/coin-master-hack-version-33-2_GM406889139.pdfIn PDF document text
    • http://ansacare.com/images/coin-master-free-spin-bonus_GM406889139.pdfIn PDF document text
    • http://ansacare.com/images/appsmobinfo-coinmasterhack-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://ansacare.com/images/free-tiktok-coins_GM835599320.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_002_off00002d32.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2D32 23104 bytes
SHA-256: 52547214988aa47a56f702c192d9e075b78197dbeb2d7290cc550e98761c9991
font_01_sfnt_off0000611a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x611A 19088 bytes
SHA-256: 0441eb652df88f1e6ade8fffec2548cac82df5748e4624fe8a21275a584aebf9

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