Malicious PDF — malware analysis report

Static analysis result for SHA-256 c12b933611d8a622…

MALICIOUS

PDF

47.4 KB Created: 2021-06-04 03:40:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: eef6320edfe22429de4b73479a3f4451 SHA-1: 0db7f595d4c9c69ccf4877f61a86e24d5bb16dc4 SHA-256: c12b933611d8a622a9ef2535507d6c503926f28858f03585191aec074a291e5f
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to redirect users to potentially malicious websites, disguised as generators for game currency or hacks. The primary lure URL is 'https://netcdn.online/app/431946152/codes-to-get-free-robux-game-hack'. The document body and heuristics indicate a focus on 'free Robux' and 'game hacks', suggesting a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious redirection workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.online/app/431946152/codes-to-get-free-robux-game-hack In PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/how-to-change-your-username-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/minecraft-free-games-no-download_GM479516143.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/hacked-client-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/how-to-create-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/daily-free-spins-coin-master-heaven_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/android-coin-master-3433-apk-hack_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/wurst_GM479516143.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/free-coin-master-spins-links-2021_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/coin-master-free-spins-2021-generator_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/coin-free-master_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/spin-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/roblox-tracker_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/coin-master-hack-with-facebook-login_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/moon-active-games_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/coin-master-cards-free_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/how-you-get-robux_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/online-coin-master-free-spin-app_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000502c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x502C 24784 bytes
SHA-256: c80998c370413581acac48c63c114f856834300208358cd696192320921122d8
font_01_sfnt_off0000895d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x895D 4044 bytes
SHA-256: 1d294e62aaefc825cba540a99fbe2f43d024ae9b415520d51a46ac355274ef33
font_02_sfnt_off00009687.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9687 18292 bytes
SHA-256: c4e16f213ba515826b0fc8bd2adb9a42249615e2a7fe5232f5ebe2d4ec6172c1

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