Malicious PDF — malware analysis report

Static analysis result for SHA-256 107df2a022b04401…

MALICIOUS

PDF

44.4 KB Created: 2021-06-03 13:11:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 4e94feab732b51b470b495c4b9443c78 SHA-1: d2d360e49fca98b12051151d460978d22582d7f7 SHA-256: 107df2a022b04401b446042bec0ec52b9969bb3b497afba004a3eddfe34cff73
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as game hacks and free generators. The primary malicious URL identified is https://netcdn.online/app/406889139/hack-coin-master-apk-33-game-hack. The document body and heuristics indicate a lure to download potentially unwanted or malicious software.

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.online/app/406889139/hack-coin-master-apk-33-game-hack In PDF document text
    • http://pustaka-smpn3tpi.com//repository/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-to-get-minecraft-windows-10-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/how-to-earn-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/minecraft-java-free-account_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/can-you-still-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-hack-ios-apk_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-70-spin-link_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/hack-avatar_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-roebucks_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_off000051b2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51B2 25064 bytes
SHA-256: e8141c3e120a15d1423e23d289eb8493c892b966c01fe06cbbd2ebd5498fe9f5
font_01_sfnt_off00008ba6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BA6 18068 bytes
SHA-256: 552a377a66a0d7bf4421efe7f0ee473ee5b0c427322e080a6a34efa7501e74ab