Malicious PDF — malware analysis report

Static analysis result for SHA-256 6830179ec99da591…

MALICIOUS

PDF

45.9 KB Created: 2021-05-10 19:31:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 97045a6206e45879bf649c229ffc0c86 SHA-1: 3f255f1464f6231645828fb4e1a524f30e131a75 SHA-256: 6830179ec99da591502af485f22c2fd773fc0c8ecfff563b854ff58d476c08a5
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 0.9432

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/406889139/coin-master-free-spins-and-coins-2021-game-hack PDF link annotation
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/best-free-minecraft-server-hosting-reddit_GM479516143.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/coin-master-free-spins-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/free-roblox-hack_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/will-minecraft-ever-be-free_GM479516143.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/spin-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/login-robux_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/coin-master-card-collection-hack-2021_GM406889139.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_003_off00004b7b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B7B 25216 bytes
SHA-256: 49dc57b2389b2c378206f96f601b2374fb9d8015fb6aec7f2966caa8c7de18e8
font_01_sfnt_off000084f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84F6 3240 bytes
SHA-256: 1db801211e8d2664cbea0d7e5df19bea1271b362ff4d12e65372d46fe571664b
font_02_sfnt_off00009026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9026 18460 bytes
SHA-256: c259e1f543e24e5bfe6ce8cf601a342cc00786119f62dbfadbed712250492c46

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