Malicious PDF — malware analysis report

Static analysis result for SHA-256 259a16117d3cfc6d…

MALICIOUS

PDF

43.3 KB Created: 2021-05-11 13:16:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: d9ecad9ae794027398b2983971555311 SHA-1: 604d6b4339444c1b49d0eef8142c111e872bd997 SHA-256: 259a16117d3cfc6dd47590f921992c3b9b026a72fee30176dac6588048385891
160 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors and websites offering game hacks and free spins, indicating a social engineering lure. The document body and heuristics confirm the intent to redirect users to potentially harmful content, likely as a precursor to malware delivery or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/406889139/extra-free-spins-for-coin-master-game-hack In PDF document text
    • https://ethraa.ae/userfiles/files/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/coin-master-cards-hack-2021_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/download-apps-for-robux_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/clean-master-hack-coins_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/rbx-com_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/coin-master-free-coins-and-spins-daily-summary_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/rbx-hut-promo-codes_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-roblox-hack_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/hack-minecraft_GM479516143.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/what-is-a-minecraft-client_GM479516143.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-roblox-svg_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/safe-hack-for-coin-master-android_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_off000048d5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48D5 31800 bytes
SHA-256: f9df2eebb775a60cf42d62ee221f50545e4b6e67bad2ff1ec62e7339ba46f506
font_01_sfnt_off00008791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8791 18096 bytes
SHA-256: 96bd0bb09572b3bddfd838baa4c331de3f827c8f9b81fb8d0ba3a71af1e92560

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