Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f10e70a751ddf7a…

MALICIOUS

PDF

44.7 KB Created: 2021-06-08 11:01:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 70dd733623db58d998d02497022f6f93 SHA-1: 104b1c0bf60b49c366570f2028498c25305f796c SHA-256: 2f10e70a751ddf7a24ba5cc8b37d8601bf12572d6de6828bc9294bbe8ce8cda0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free Robux' or game hacks. The ML classifier strongly indicated maliciousness, and the presence of redirector links confirms a malicious workflow. The document body and embedded URLs suggest a social engineering lure to trick users into visiting potentially harmful sites.

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/free-robux-apps-for-window-only-game-hack In PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/minecraft-aimbot_GM479516143.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/how-to-get-java-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/freespinandcoin-blogspot_GM406889139.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/tiktok-free-like-2021_GM835599320.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/coin-master-free-spins-5-10-2021_GM406889139.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/coin-master-hack-app-android-download_GM406889139.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/mathep_GM431946152.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/www-coin-master_GM406889139.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/free-coins-for-planet-master-game_GM406889139.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/game-give-free-robux_GM431946152.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/roblox-hacks-for-mac_GM431946152.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/www-free-robux_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_004_off00004ff3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FF3 25232 bytes
SHA-256: 048bb0d012fceb376da01fe22e06a3d9043c03ba5b93fff1b1b49e9b16e487a0
font_01_sfnt_off00008984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8984 19100 bytes
SHA-256: b0c25b66c18c1a6509b85bd80ef120336e3fc13344c1d0fc38d9cddee35178f4

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