Malicious PDF — malware analysis report

Static analysis result for SHA-256 78913ff308fad030…

MALICIOUS

PDF

34.9 KB Created: 2021-07-05 04:02:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 11e90c5739ed79e4427e0d36d2d115db SHA-1: f13b56ac3b96a47f983d717372ecf2e8fddca232 SHA-256: 78913ff308fad030332ec93877d01a6d17f07bbabd3c3ffda903b72234e36f0e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains a lure for free in-game currency and hacks, directing users to the URL http://netcdn.tw/app/406889139/free-coin-master-coins-and-spins-game-hack. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs and a download button lure indicate a likely attempt to redirect users to a malicious site. No scripts were extracted, but the overall pattern suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/406889139/free-coin-master-coins-and-spins-game-hack PDF link annotation
    • http://belajar.maalfalaahiyah.sch.id/__statics/gudangsoal/files/minecraft-gun-games-free_GM479516143.pdfIn PDF document text
    • http://belajar.maalfalaahiyah.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://belajar.maalfalaahiyah.sch.id/__statics/gudangsoal/files/dupe-tool-hack-roblox_GM431946152.pdfIn PDF document text
    • http://belajar.maalfalaahiyah.sch.id/__statics/gudangsoal/files/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://belajar.maalfalaahiyah.sch.id/__statics/gudangsoal/files/how-to-get-a-star-code-roblox-hack_GM431946152.pdfIn PDF document text
    • http://belajar.maalfalaahiyah.sch.id/__statics/gudangsoal/files/free-robux-roblox-hack-proof-no-human-verification_GM431946152.pdfIn PDF document text
    • http://belajar.maalfalaahiyah.sch.id/__statics/gudangsoal/files/minecraft-mac-free_GM479516143.pdfIn PDF document text
    • http://belajar.maalfalaahiyah.sch.id/__statics/gudangsoal/files/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://belajar.maalfalaahiyah.sch.id/__statics/gudangsoal/files/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://belajar.maalfalaahiyah.sch.id/__statics/gudangsoal/files/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://belajar.maalfalaahiyah.sch.id/__statics/gudangsoal/files/xray-cheats-for-roblox_GM431946152.pdfIn PDF document text
    • http://belajar.maalfalaahiyah.sch.id/__statics/gudangsoal/files/roblox-games-free_GM431946152.pdfIn PDF document text
    • http://belajar.maalfalaahiyah.sch.id/__statics/gudangsoal/files/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://belajar.maalfalaahiyah.sch.id/__statics/gudangsoal/files/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://belajar.maalfalaahiyah.sch.id/__statics/gudangsoal/files/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://belajar.maalfalaahiyah.sch.id/__statics/gudangsoal/files/roblox-promo-codes-2021-free_GM431946152.pdfIn PDF document text
    • http://belajar.maalfalaahiyah.sch.id/__statics/gudangsoal/files/no-human-verification-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://belajar.maalfalaahiyah.sch.id/__statics/gudangsoal/files/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://belajar.maalfalaahiyah.sch.id/__statics/gudangsoal/files/free-robux-obby_GM431946152.pdfIn PDF document text
    • http://belajar.maalfalaahiyah.sch.id/__statics/gudangsoal/files/roblox-apocalypse-rising-hack_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_off000031d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31D8 23096 bytes
SHA-256: 0d28f4bfc3426b85e179653fa865b9468b81b1d1f61c0d36d432367cc2fea6fc
font_01_sfnt_off00006599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6599 18348 bytes
SHA-256: cc12283f691ecd9c6c4381c5355a15c3235cfa1ea9601b68c1f91d3883d88a7b

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