Malicious PDF — malware analysis report

Static analysis result for SHA-256 449041efa83746c9…

MALICIOUS

PDF

33.8 KB Created: 2021-07-09 02:14:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 3b1c4fe1e6f7479d69d0910a9dbc2ef9 SHA-1: a1817d34399d676137d44ef3a655132658f28118 SHA-256: 449041efa83746c9bcbcb07487e4cd860b6c85e4317ea2405e6a8a0fb73467d1
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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 http://netcdn.tw/app/431946152/how-to-get-free-robux-no-verification-game-hack PDF link annotation
    • https://e-learning.mtsn6-cirebon.sch.id/__statics/gudangsoal/files/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn6-cirebon.sch.id/__statics/gudangsoal/files/free-coin-spin_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn6-cirebon.sch.id/__statics/gudangsoal/files/install-free-game-coin-master_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn6-cirebon.sch.id/__statics/gudangsoal/files/how-to-get-robux-fast_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn6-cirebon.sch.id/__statics/gudangsoal/files/free-shirt-templates-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn6-cirebon.sch.id/__statics/gudangsoal/files/coin-master-hack-online-android_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn6-cirebon.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-31-march-2021_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn6-cirebon.sch.id/__statics/gudangsoal/files/free-roblox-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn6-cirebon.sch.id/__statics/gudangsoal/files/cheats-for-roblox-on-phone_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn6-cirebon.sch.id/__statics/gudangsoal/files/free-coin-master-links_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn6-cirebon.sch.id/__statics/gudangsoal/files/giftrobux-com-generator_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn6-cirebon.sch.id/__statics/gudangsoal/files/500-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn6-cirebon.sch.id/__statics/gudangsoal/files/lucky-patcher-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn6-cirebon.sch.id/__statics/gudangsoal/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn6-cirebon.sch.id/__statics/gudangsoal/files/how-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn6-cirebon.sch.id/__statics/gudangsoal/files/eclipse-roblox-hack-injection-failed_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn6-cirebon.sch.id/__statics/gudangsoal/files/do-robux-generators-work_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn6-cirebon.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn6-cirebon.sch.id/__statics/gudangsoal/files/free-minecraft-java-edition-account_GM479516143.pdfIn PDF document text
    • https://e-learning.mtsn6-cirebon.sch.id/__statics/gudangsoal/files/roblox-highschool-hack-script-oder_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_off00002db8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DB8 22200 bytes
SHA-256: 1cd6ad33df8a533d6cc3fb3dbb3ac93173ef050c380683efac0854ad09aab28e
font_01_sfnt_off00005eef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EEF 19240 bytes
SHA-256: 7000039a4416ac0135e90d34ca5c89af1b7d80dfbac1969cb80e33a7c999222c

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