Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8fa64c1c25ffafc…

MALICIOUS

PDF

46.5 KB Created: 2021-06-03 20:24:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 82c13cf0f7bee026beaa1105860cfbad SHA-1: 17b05ce1ec384a10c8bf667e4934f8f76a887784 SHA-256: a8fa64c1c25ffafc5a021c4f539f061ae8863913bd7ddb1c528af49d8b27319c
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 0.9748

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/easy-robux-hack-game-hack PDF link annotation
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/win-free-robux_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/adopt-me-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/links-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-download-ios_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/coin-master-hack-spins-game-download_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/roblox-source_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/pokemon-go-free-codes-october-2021_GM1094591345.pdfIn PDF document text
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/how-to-free-robux_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/robux-today_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/oprewards-com-robux_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-ios_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/free-minecraft-maps-pe_GM479516143.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_off0000511b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x511B 24088 bytes
SHA-256: f56601691e1f33d7e75c6bb891273a679c54f2855ce8a34a5413ca40c167e411
font_01_sfnt_off0000883a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x883A 2892 bytes
SHA-256: c2578a292634a901613c1dd9f9883dd4930e6811e59ae03d696f263e56ea17b4
font_02_sfnt_off00009224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9224 18428 bytes
SHA-256: 2bceebe5c1993dbcd4316f947943b347169ed843d74f7d3766fe916d90107923

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