Malicious PDF — malware analysis report

Static analysis result for SHA-256 35692456a366d864…

MALICIOUS

PDF

41.5 KB Created: 2021-05-13 14:02:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 3db4f0ca15883d3724e2b8b6d4190fa3 SHA-1: 824f43b929e98bbf436c161cedc2feefacb518cf SHA-256: 35692456a366d8641c0d186c2699bd99aacc05a99699bc361b86bc1ecd3951af
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a website offering game hacks and generators, a common lure for distributing malware. The ML classifier strongly indicated maliciousness, and the presence of multiple external URIs further supports this. No scripts were extracted, but the document's structure and embedded links suggest it's designed to trick users into downloading a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/479516143/optifine-pe-game-hack PDF link annotation
    • http://e-learning.mtsn4bombana.sch.id/__statics/gudangsoal/files/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://e-learning.mtsn4bombana.sch.id/__statics/gudangsoal/files/rbx-com_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsn4bombana.sch.id/__statics/gudangsoal/files/free-roblox-cards-pin-number_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsn4bombana.sch.id/__statics/gudangsoal/files/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsn4bombana.sch.id/__statics/gudangsoal/files/what-is-coin-master-app_GM406889139.pdfIn PDF document text
    • http://e-learning.mtsn4bombana.sch.id/__statics/gudangsoal/files/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsn4bombana.sch.id/__statics/gudangsoal/files/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsn4bombana.sch.id/__statics/gudangsoal/files/coin-master-hack-tool-without-verification_GM406889139.pdfIn PDF document text
    • http://e-learning.mtsn4bombana.sch.id/__statics/gudangsoal/files/minecraft-pe-015-0-apk-free-download_GM479516143.pdfIn PDF document text
    • http://e-learning.mtsn4bombana.sch.id/__statics/gudangsoal/files/coin-master-hack-spins-download_GM406889139.pdfIn PDF document text
    • http://e-learning.mtsn4bombana.sch.id/__statics/gudangsoal/files/minecraft-windows-10-edition-hacked-client_GM479516143.pdfIn PDF document text
    • http://e-learning.mtsn4bombana.sch.id/__statics/gudangsoal/files/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsn4bombana.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsn4bombana.sch.id/__statics/gudangsoal/files/free-robux-link_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsn4bombana.sch.id/__statics/gudangsoal/files/clients-minecraft_GM479516143.pdfIn PDF document text
    • http://e-learning.mtsn4bombana.sch.id/__statics/gudangsoal/files/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://e-learning.mtsn4bombana.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-group_GM406889139.pdfIn PDF document text
    • http://e-learning.mtsn4bombana.sch.id/__statics/gudangsoal/files/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://e-learning.mtsn4bombana.sch.id/__statics/gudangsoal/files/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://e-learning.mtsn4bombana.sch.id/__statics/gudangsoal/files/coin-game_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
stream_003_off00004a9c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A9C 24244 bytes
SHA-256: 167646b3c2f6f802a96af3b777621ee8ce8b4308661863bd997445e714921906
font_01_sfnt_off000081d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81D8 17672 bytes
SHA-256: 5a469ca17a8c140357c1150986cbf8b325a348879e3a8ed2f5f73ca7af5c2fd6

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