Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa674c6a2720c5d6…

MALICIOUS

PDF

48.9 KB Created: 2021-06-03 05:25:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: cca451963914a98d2a2e380cb1981a34 SHA-1: a9d015d9a0f6e79d241026dd5765d629072f6129 SHA-256: fa674c6a2720c5d628a6a9348da1caf469cf44145617c5efb40abc7e84cb6902
82 Risk Score

Malware Insights

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

This PDF document contains multiple links to external websites that are designed to lure users into downloading potentially malicious files, disguised as game hacks or generators. The ML classifier strongly indicated maliciousness, and the presence of numerous suspicious URLs reinforces this assessment. No scripts were extracted, but the primary attack vector appears to be social engineering via deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/wahoo-gaming-co-free-robux-game-hack PDF link annotation
    • http://perpustakaan-stikesmsb.com/repository/free-robux-images_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/lazyblocks-com-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/roblox-bloxburg-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/minecraft-download-free-download_GM479516143.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/coin-master-cards-for-free_GM406889139.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/roblox-redeem-codes-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/how-to-download-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/free-shirt-templates-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/roblox-promo-codes-2021-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/coin-master-hack-tool-v1-9-pc_GM406889139.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/synapse-roblox-free-download_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004fd9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FD9 27876 bytes
SHA-256: 9ae1388d08e7c77e18df7419bd6a48f964b88a12c2715a5a81251bc5e1026338
font_01_sfnt_off00008fac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FAC 2908 bytes
SHA-256: 5879c26d32e0ab4faed3d680263fa74cc266a38abde1d6ee4d56808f786447fc
font_02_sfnt_off000099a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99A5 19272 bytes
SHA-256: 72186c943ebdf5aadbcd95d877410298c2bcf6c8326a7dd5e0ae66436694e568

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