Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4b538c55296262b…

MALICIOUS

PDF

46.4 KB Created: 2021-05-19 15:46:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: c31b64232d4ca90f7100d294a40916ef SHA-1: 407366b020773a3c91c4097a355ef712c2054b45 SHA-256: a4b538c55296262ba2e8294ca4dbd1799abe9b7e8f7972ae7656d75df1570081
122 Risk Score

Malware Insights

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

The PDF document contains lures for game hacks and exploits, including a fake download button and a prompt for MFA codes, suggesting a credential harvesting or malware distribution attempt. The embedded URLs point to external resources that likely host malicious payloads or phishing pages. No scripts were extracted, but the PDF structure and heuristics indicate a malicious intent to trick users into downloading potentially harmful content or divulging sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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/479516143/minecraft-bedrock-edition-pc-download-free-game-hack PDF link annotation
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/free-roblox-pin-codes_GM431946152.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/script-executor-roblox-free_GM431946152.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/coin-master-hack-version-apk-download_GM406889139.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/minecraft-for-chromebook-free_GM479516143.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/coin-master-games-download-free_GM406889139.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/mcpe_GM479516143.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/coin-master-free-chest-link_GM406889139.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/coin-master-card-hack-app_GM406889139.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/coin-master-blogspot-free-spins_GM406889139.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/toolbox-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/coin-master-hack-apk-april-12-2021_GM406889139.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/free-robux-obby_GM431946152.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/coin-master-spin-link-2021_GM406889139.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/free-spins-coin-master-march-2021_GM406889139.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_003_off00004b98.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B98 25776 bytes
SHA-256: d2e371270aa79bbfbfdd4442415e3c0ca04a0994906023037ebbe0a2b8555b5d
font_01_sfnt_off000086e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86E7 3092 bytes
SHA-256: 3811f2fb1880daf4953efcc9c7427d9b438bced237490b00be4a6ec3ecea79e0
font_02_sfnt_off00009192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9192 18828 bytes
SHA-256: bab883dfc84e1a3f345dfae0998a7e69f5c6c1aec602e5a20de586714fc0e9f0

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