Malicious PDF — malware analysis report

Static analysis result for SHA-256 578f17ebd893f497…

MALICIOUS

PDF

35.9 KB Created: 2021-06-20 08:06:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 837a5c4cd5df7d9b697db5e4fc13586b SHA-1: 1896317a4d9162852b9556c56a575a90754243ce SHA-256: 578f17ebd893f497f57177bae8b0019de9d72fba643fef8f8ae7a15caf4b1b50
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'free Robux' and game hacks, directing users to a suspicious URL. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' indicates this is a common social engineering tactic to trick users into visiting potentially malicious sites. Although no scripts were explicitly extracted, the nature of the lure suggests it is designed to lead to a download or further compromise. The ML classifier strongly supports the malicious verdict.

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.co/app/431946152/free-robux-no-human-verification-or-survey-2021-game-hack PDF link annotation
    • https://elearning.manbondowoso.sch.id/__statics/gudangsoal/files/what-do-roblox-points-do_GM431946152.pdfIn PDF document text
    • https://elearning.manbondowoso.sch.id/__statics/gudangsoal/files/free-robux-place_GM431946152.pdfIn PDF document text
    • https://elearning.manbondowoso.sch.id/__statics/gudangsoal/files/roblox-hack-menu-download-2021_GM431946152.pdfIn PDF document text
    • https://elearning.manbondowoso.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • https://elearning.manbondowoso.sch.id/__statics/gudangsoal/files/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • https://elearning.manbondowoso.sch.id/__statics/gudangsoal/files/cute-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.manbondowoso.sch.id/__statics/gudangsoal/files/rich-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://elearning.manbondowoso.sch.id/__statics/gudangsoal/files/is-minecraft-free-on-pc_GM479516143.pdfIn PDF document text
    • https://elearning.manbondowoso.sch.id/__statics/gudangsoal/files/script-free-robux-2021-no-fake_GM431946152.pdfIn PDF document text
    • https://elearning.manbondowoso.sch.id/__statics/gudangsoal/files/roblox-booga-booga-mojo-hack_GM431946152.pdfIn PDF document text
    • https://elearning.manbondowoso.sch.id/__statics/gudangsoal/files/what-are-points-for-in-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.manbondowoso.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://elearning.manbondowoso.sch.id/__statics/gudangsoal/files/static-moonactive-net-link_GM406889139.pdfIn PDF document text
    • https://elearning.manbondowoso.sch.id/__statics/gudangsoal/files/minecraft-clipart-free_GM479516143.pdfIn PDF document text
    • https://elearning.manbondowoso.sch.id/__statics/gudangsoal/files/gamehunters-club-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.manbondowoso.sch.id/__statics/gudangsoal/files/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.manbondowoso.sch.id/__statics/gudangsoal/files/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • https://elearning.manbondowoso.sch.id/__statics/gudangsoal/files/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.manbondowoso.sch.id/__statics/gudangsoal/files/new-free-stuff-on-roblox-august-2021_GM431946152.pdfIn PDF document text
    • https://elearning.manbondowoso.sch.id/__statics/gudangsoal/files/how-to-hack-coin-master-spin-in-hindi_GM406889139.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_off00003206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3206 22540 bytes
SHA-256: cc30a8eccebc46931ff32e9b89d9158c796b301737242174a0d2128adc978099
font_01_sfnt_off00006447.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6447 20028 bytes
SHA-256: a686843967d16d630a3d792aecd0df7810ef9440d33d67b3fe7886ce86e787de

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