Malicious PDF — malware analysis report

Static analysis result for SHA-256 b148c07c3a55b7c1…

MALICIOUS

PDF

48.0 KB Created: 2021-06-04 03:12:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 30b2c830053fea6ca512afb5c5a17538 SHA-1: ef28ec3348a848a894e73abc4f8ce7024d2c6bc2 SHA-256: b148c07c3a55b7c1ebd3e8777e5ba6e0ba8cee565b4a180b3f246113b8eec137
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, specifically advertising free generators and game hacks for popular games. The primary lure appears to be 'Roblox Free Roblox' leading to a URL hosted on netcdn.online. While no scripts were extracted, the PDF structure and embedded URLs strongly indicate a phishing or scam attempt, likely to deliver a secondary payload or lead users to a credential harvesting page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

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.online/app/431946152/roblox-free-roblox-game-hack In PDF document text
    • http://lib3tell.stptrisakti.net/repository/mcpe-116_GM479516143.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/coin-master-hack-2021-download_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/roblox-a_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/coin-master-hack-ios_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/robux-offers_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/100-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/free-minecraft-server-maker_GM479516143.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/pubg-uc-buy-cheap_GM1330123889.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/coin-master-daily-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-minecraft-accounts-2021_GM479516143.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/coin-master-online-hack-link_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/what-is-coin-master_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/coin-master-free-coins-twitter_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/coin-master-daily-free-spins-2021_GM406889139.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_off0000598c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x598C 28596 bytes
SHA-256: ac31197998a21f8335682343be2cb07dca831ad4c60ee2a295f93781e0f644c9
font_01_sfnt_off00009a3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A3E 17948 bytes
SHA-256: 33938510eb20d060112d7682b9c88b880e5c2c8c33e748f0e85f3cc6be6c07ce

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