Malicious PDF — malware analysis report

Static analysis result for SHA-256 aacf5c7b6b06cc1c…

MALICIOUS

PDF

41.6 KB Created: 2021-05-11 12:39:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 73a501634190a4b920c21dfe4cf6c1c4 SHA-1: 9857bcfa3d9703c58606426f6f979493dd0837ad SHA-256: aacf5c7b6b06cc1cb52bb02647f56d7807398f8c40a51059ebc93edd13bfa58b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to malicious redirectors, specifically designed to lure users into downloading more malicious content under the guise of game hacks and generators. The document body and embedded URLs strongly suggest a social engineering tactic to trick users into clicking through to potentially harmful sites. The primary malicious URL identified is https://netcdn.xyz/app/406889139/get-free-spins-coin-master-game-hack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/get-free-spins-coin-master-game-hack In PDF document text
    • http://maxvanberchem.org/images/free-download-coin-master_GM406889139.pdfIn PDF document text
    • http://maxvanberchem.org/images/hacks-minecraft_GM479516143.pdfIn PDF document text
    • http://maxvanberchem.org/images/free-spins-generated-from-coin-master_GM406889139.pdfIn PDF document text
    • http://maxvanberchem.org/images/robux-website_GM431946152.pdfIn PDF document text
    • http://maxvanberchem.org/images/how-to-change-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • http://maxvanberchem.org/images/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://maxvanberchem.org/images/www-coinmaster-com_GM406889139.pdfIn PDF document text
    • http://maxvanberchem.org/images/get-more-robux_GM431946152.pdfIn PDF document text
    • http://maxvanberchem.org/images/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://maxvanberchem.org/images/coin-master-free-spin-software_GM406889139.pdfIn PDF document text
    • http://maxvanberchem.org/images/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://maxvanberchem.org/images/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
    • http://maxvanberchem.org/images/how-to-get-free-unlimited-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://maxvanberchem.org/images/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://maxvanberchem.org/images/is-minecraft-free-on-mac_GM479516143.pdfIn PDF document text
    • http://maxvanberchem.org/images/how-to-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://maxvanberchem.org/images/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://maxvanberchem.org/images/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • http://maxvanberchem.org/images/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://maxvanberchem.org/images/free-robux-without-human-verification-real_GM431946152.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_off00004675.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4675 25724 bytes
SHA-256: f679fcfc51874d8a654bf155f3ef0586e3c0bfaa5bedc8dd7ca2bead4ff29c9b
font_01_sfnt_off0000819d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x819D 17884 bytes
SHA-256: b0210710b9f532dde69bab3e54691bd54d84b0d7d990975f20826afd1ba27450

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