Malicious PDF — malware analysis report

Static analysis result for SHA-256 90e5f4be16b9ff34…

MALICIOUS

PDF

34.6 KB Created: 2021-07-03 13:08:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e96caffe87ad5c1d213a8737cfadb50d SHA-1: c35f58a5976404de603382a335d162fd52a96553 SHA-256: 90e5f4be16b9ff34c62c659ec949fd2fac279161ea3be98c5cc899bd113de461
142 Risk Score

Malware Insights

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

The PDF contains numerous links, identified as a link farm, that lure users with promises of game hacks and free items for popular games like Roblox and Coin Master. The primary URL, http://netcdn.tw/app/431946152/roblox-mazda-2021-free-game-hack, is directly linked to this deceptive content. This suggests the document's purpose is to drive traffic to potentially malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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 http://netcdn.tw/app/431946152/roblox-mazda-2021-free-game-hack PDF link annotation
    • http://library.forda-mof.org/katalog/repository/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-private-server-roblox_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-free-spin-and-coin-link-today_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-plain-yellow-t-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-get-a-free-roblox-group_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/descargar-roblox-para-pc-hackeado_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-use-cheat-engine-on-roblox-bee-swarm_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/earn-robux-today_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-get-free-robux-on-2021-ouick_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/www-rubux_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coinmaster_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-make-a-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/cheat-fr-roblox_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-heaven-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/roblox-download-free-pc-windows-7_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-free-spins-app-for-iphone_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/roblox-2021-hack_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_off00002f08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F08 22336 bytes
SHA-256: e565eb5bf03ed4acbdf353bda47b7f977a5aa618623fdfa0b9b1442470adc647
font_01_sfnt_off000060af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60AF 19504 bytes
SHA-256: 46610707bebf683f1d46ee4c869add945f178405266b3948a39bfc8f584e725d

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