Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fb1f379456d47f2…

MALICIOUS

PDF

35.6 KB Created: 2021-06-20 05:00:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: bb42315d21cbc7fbcc1ac1665027ac8a SHA-1: f235bb8a14a218826602772bf5329fd0f4b4e98c SHA-256: 2fb1f379456d47f2efcc48fff24052eb926edf6e7ee0a9d739a257711ccfd958
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a lure related to game hacks and redirects to a known malicious URL. The ML classifier also flagged this PDF with high confidence. While no scripts were extracted, the presence of a malicious redirector indicates an attempt to lead the user to a compromised site, likely for further exploitation or malware delivery.

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.co/app/431946152/does-cheat-engine-work-for-roblox-2021-game-hack In PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/free-coins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/roblox-solo-hack-client_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/free-spins-and-coins-from-coin-master-game_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/is-minecraft-java-free_GM479516143.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/how-to-not-get-your-roblox-account-hacked_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/how-to-cheat-in-yin-vs-yang-ninja-assassin-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/coin-master-hacks-for-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/coin-mast-hacks_GM406889139.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/free-roblox-accounts-rich-2021-august_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/free-minecraft-account-and-password-generator_GM479516143.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/coin-master-hack-tool-no-human-verification_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/roblox-hair-for-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/free-coins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/roblox-card-codes-hack_GM431946152.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/paint-net-free-download-for-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/farewell-hack-roblox-one-piece-open-seas_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/legitimate-coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off000031ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31FF 22392 bytes
SHA-256: 9ee019475ddc1c3eb8b870332c8b03f22386a39b9c9b74f35fa435cd86a61308
font_01_sfnt_off00006381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6381 19976 bytes
SHA-256: c19ada8c6d189811cac89dca83ac4ce39db83d6efcdf0829e6b51ef36a863db4

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