Malicious PDF — malware analysis report

Static analysis result for SHA-256 20c1070165433a8b…

MALICIOUS

PDF

43.7 KB Created: 2021-06-07 03:49:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 38d61fc84f65cf2b452ff81218d6c800 SHA-1: c2e5c6a42c2e357755180126158b6762ea6e044c SHA-256: 20c1070165433a8bf538e1c78c74f01ea1a9193fe39a03ed0a58643b0aabda9b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and infrastructure, disguised as "free generator / game hack" lures. The primary malicious link identified is https://netcdn.tw/app/431946152/http-bloxy-site-roblox-free-robux-game-hack. The document body, though heavily obfuscated, contains references to this URL and appears to be part of a social engineering attempt to drive traffic to malicious sites. No scripts were extracted, but the presence of malicious links and the lure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/http-bloxy-site-roblox-free-robux-game-hack In PDF document text
    • https://creationegyptco.com/userfiles/files/coin-master-hack-cydia_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/coin-master-card-link-free_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/minecraft-coins-free_GM479516143.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/minecraft-world-free-download_GM479516143.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/coin-master-32-hack-apk-download_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/coin-master-game-android-free-download_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/minecraft-pe-017-0-apk-free-download-android_GM479516143.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/freer-tiktok_GM835599320.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/how-to-get-roebucks_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/coin-master-hacks-that-work_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/coin-master-free-spins-1701-20_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/free-fans-on-tiktok_GM835599320.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/minecraft-bedrock-for-free_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_004_off00004fec.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FEC 24060 bytes
SHA-256: 0e5e533a984c7ed0e3b16731887bb4ace976beaf3183c5c8f4d8ac560175b3d6
font_01_sfnt_off000086e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86E4 18668 bytes
SHA-256: 89fe1afb797234c6da7f1b7b783982fd1097c30cb442600391bc0a8e1dd392e6

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