Malicious PDF — malware analysis report

Static analysis result for SHA-256 13dfcbd81c1a352b…

MALICIOUS

PDF

34.5 KB Created: 2021-07-04 20:44:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: bcc66621b44f5971d9fa812e51273588 SHA-1: 49f3c66cd95a530f7fbc5622ef73694a7e984498 SHA-256: 13dfcbd81c1a352b6ff8f45d2650002be07fae0ecebe5ed431d3eb1eaf8f1bf3
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 0.9980

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/479516143/will-minecraft-ever-be-free-game-hack PDF link annotation
    • http://perpustakaan.pa-dompu.go.id/repository/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/coin-master-free-spins-link-quora_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/robux-match_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/coin-master-free-spins-2021-apk_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/robux-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/free-decals-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/roblox-upgrade-free-download_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/coin-master-hack-no-root_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/free-robux-com_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/lots-of-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/meep-city-robux-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/coin-master-hack-mod_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/how-to-get-free-1-million-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/how-to-hack-roblox-personal-servers_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/roblox-hack-launcher_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/roblox-free-gamepass-script-v3rmillion_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/free-roblox-shirts-templates-survivor_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/roblox-premium-free_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_off000031d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31D6 22512 bytes
SHA-256: 328d48849f1aad7a724f728fe232c16585f1437bc5036ed0293cc95bb9fcf056
font_01_sfnt_off000063d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63D9 18460 bytes
SHA-256: ff9350cabebb90671f53b39f5ebb095a1547985ecb9ab55cbe00cf3bc8f410c6

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