Malicious PDF — malware analysis report

Static analysis result for SHA-256 c70392c9547e4d2f…

MALICIOUS

PDF

47.1 KB Created: 2021-05-17 08:09:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f63d9caf336018a447ca915bbaca9d62 SHA-1: aba7d2082b6c128fdcc15fd383b14ac43f2fab88 SHA-256: c70392c9547e4d2f956dcdbeac7d0047c26cdf753329c937c9169740b9e11488
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 0.8948

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/431946152/how-do-u-hack-roblox-game-hack PDF link annotation
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/rbx-roblox-robux_GM431946152.pdfIn PDF document text
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/freerobux-co_GM431946152.pdfIn PDF document text
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/how-to-play-minecraft-with-friends-for-free_GM479516143.pdfIn PDF document text
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/how-to-get-daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/free-robux-legit_GM431946152.pdfIn PDF document text
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/wurst-client-download_GM479516143.pdfIn PDF document text
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-free-download_GM406889139.pdfIn PDF document text
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/coin-master-hack-ios-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_off00004ca8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CA8 25572 bytes
SHA-256: 9823af9bdbae59993857dab0616eb77dcb0a6c5a03c2c3390b805ec3c525a945
font_01_sfnt_off0000881a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x881A 3668 bytes
SHA-256: 07b4b54ca0aea0a89b4a5d02e0d6c96bb2e093bd51fa630658fe1c4e613d7bf7
font_02_sfnt_off00009430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9430 18700 bytes
SHA-256: 24715886d6b8435fb8a33d258b866203ee2974827a311e3ab6dcb36e4a196b9f

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