Malicious PDF — malware analysis report

Static analysis result for SHA-256 198cbc29d0e31085…

MALICIOUS

PDF

34.9 KB Created: 2021-07-06 09:42:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 6bb6bd86fb9f5529a2a4363215c57972 SHA-1: 6b3d14b01045f896efa63c3d924cf1d45c354ddc SHA-256: 198cbc29d0e3108588bb5958c76d47836725e7fc2a8889ddffbeb1cd7222efed
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to free game currency and hacks, directing users to a known malicious redirector. The embedded URL `http://netcdn.tw/app/431946152/how-to-win-free-robux-game-hack` is a critical finding, indicating a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious intent to redirect users to potentially harmful content.

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/how-to-win-free-robux-game-hack In PDF document text
    • https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/how-to-get-20210-robux-free-on-phone_GM431946152.pdfIn PDF document text
    • https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/free-promo-codes-roblox_GM431946152.pdfIn PDF document text
    • https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/coin-master-free-link_GM406889139.pdfIn PDF document text
    • https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/how-to-stop-people-from-hacking-you-in-roblox_GM431946152.pdfIn PDF document text
    • https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/how-to-hack-on-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.pdfIn PDF document text
    • https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/free-blue-shirt-roblox_GM431946152.pdfIn PDF document text
    • https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/coin-master-free-coins-twitter_GM406889139.pdfIn PDF document text
    • https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/coinmasterhack-club_GM406889139.pdfIn PDF document text
    • https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/robloxmainacom-free-robux_GM431946152.pdfIn PDF document text
    • https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/moonactive-coin-master_GM406889139.pdfIn PDF document text
    • https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/free-robux-please_GM431946152.pdfIn PDF document text
    • https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/what-are-points-for-in-roblox_GM431946152.pdfIn PDF document text
    • https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/coin-master-free-spin-software_GM406889139.pdfIn PDF document text
    • https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/i-want-free-robux_GM431946152.pdfIn PDF document text
    • https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/buy-free-items-roblox_GM431946152.pdfIn PDF document text
    • https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/roblox-santa-hat-free_GM431946152.pdfIn PDF document text
    • https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/www-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30F2 22492 bytes
SHA-256: 75df7ba632585a58bd1ff3c14246aa0ffdff73e723876c60a3c0d010df75ca40
font_01_sfnt_off00006323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6323 19196 bytes
SHA-256: d4de8ba3bb8760068d37a29e92514803f273f6f34b8f58488b1b99838233901d

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