Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9c4fa7905d2d877…

MALICIOUS

PDF

34.4 KB Created: 2021-07-06 01:13:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 7695bebeec63ecf8970a78bd972f3de5 SHA-1: 3990a6ff62174a96111f5cba40418b0630586e9c SHA-256: b9c4fa7905d2d877bd22247a7fe4c59ff30cd0d5c7bf9e79ae22af64994e3ddf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to a known malicious redirector, disguised as a 'free generator' or 'game hack'. The document body and heuristics indicate a lure for popular games, aiming to trick users into clicking the malicious link. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a phishing or scam 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/406889139/coin-master-hack-spins-free-game-hack In PDF document text
    • http://library.yamasi.ac.id/repository/is-minecraft-free-on-switch_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-get-1-000-000-robux-free_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/minecraft-ore-finder-mod_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/black-hair-on-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-hack-bars-pc_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-hack-generator-tool_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-online-free-spin_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-get-free-robux-by-pressing-g_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/the-conquerors-roblox-hacked_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/cheat-buddy-roblox-esp_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-royalty-free-rap_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/10-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/comment-hacker-roblox-android_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-hack-no-virus_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-hack-jjsploit_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-get-free-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/today-free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-free-robux-hackers_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
font_00_sfnt_off00002efe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EFE 23612 bytes
SHA-256: 2c6ff60dc7f59f619e835785bf8d4aab94b6bb796c23b2756a9eb02e24e6790b
font_01_sfnt_off000063a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A9 18344 bytes
SHA-256: 4c1a6a856cca30975d4ab172116193564d8bcac3dcd41784e924849fb164ed8d

Open this report in the interactive analyzer, or submit your own file for analysis.