Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e28d13cf2d9826a…

MALICIOUS

PDF

34.9 KB Created: 2021-07-05 10:11:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: e6390cb3af01f263ba25326b9bc3244c SHA-1: 4bd04398faad96a92dde43fc7c57291399299641 SHA-256: 2e28d13cf2d9826ab42e52f1c655fc4e1d4b01cd25fae07c7fab093062777be9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure for free in-game currency and game hacks, which is a common social engineering tactic. It contains multiple links to redirector infrastructure, including http://netcdn.tw/app/431946152/free-robux-no-verification-no-download-game-hack, which is flagged as malicious. The document body and embedded URLs reinforce the theme of exploiting games like Roblox and Minecraft. No scripts were extracted, but the presence of malicious redirectors and the lure suggest a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/free-robux-no-verification-no-download-game-hack In PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-get-minecraft-for-free-on-ipad_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-robux-no-verification-no-download-no-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/roblox-bux-free_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/roblox-ultimate-driving-trucker-money-hack_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-clothes-roblox-youtube_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/hackear-juego-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/minecraft-java-free-download_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/tix-factory-tycoon-paquet-tix-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/roblox-hack-robux-apk_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/roblox-hacking-website_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/pastebin-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/gift-card-free-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/roblox-buddy-me-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/minecraft-free-education_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/flame-gg-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
font_00_sfnt_off00002ee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EE4 22736 bytes
SHA-256: de5e640896fc2a0b62f0c9c2f140ab06720075b48a0d05397f04579ecd2ac47d
font_01_sfnt_off0000618d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x618D 19652 bytes
SHA-256: 8dba42de70404ddf4ce7a70a40047468e67895e17bebeb66015d1708da090460

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