Malicious PDF — malware analysis report

Static analysis result for SHA-256 f474c2cfce87dba4…

MALICIOUS

PDF

34.7 KB Created: 2021-07-04 09:41:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ea0916151c7cee4870375c06e2b29c17 SHA-1: e7c6321069c78aff4e096c5f6d7d4003c758f49a SHA-256: f474c2cfce87dba416f77a9cc814eff5e36af163b9bb5adf70aae284d0cd408d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as game hacks and generators. The primary lure is the URL http://netcdn.tw/app/479516143/minecraft-free-play-now-game-hack, which is associated with known malicious redirectors. While no scripts were extracted, the document's structure and embedded URLs strongly suggest a phishing or malware distribution attempt.

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/479516143/minecraft-free-play-now-game-hack In PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/roblox-ftw_GM431946152.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/roblox-follow-flamingo-hack_GM431946152.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/minecraft-free-no-download_GM479516143.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/minecraft-games-free-to-play-online_GM479516143.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/e-free-roblox_GM431946152.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/coin-master-hack-injection_GM406889139.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/40-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/250-robux-free_GM431946152.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/hacks-roblox-mad-city_GM431946152.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/free-spins-coin-master-android_GM406889139.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/coin-master-hack-app-download-free_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
font_00_sfnt_off000033d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33D7 22116 bytes
SHA-256: 5f0ac2e32062a6edfb3ae2cb75c7ded38c22c909aaf595633cf792415066775a
font_01_sfnt_off00006427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6427 18568 bytes
SHA-256: 3e0abc5b15d88dae619c763eae79776feda0b9ec47dc34c89399b14846fbc152

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