Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4a02b0c5d067900…

MALICIOUS

PDF

48.0 KB Created: 2021-06-08 22:02:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 5293e2de90ddd9a463812b237bdeb0b6 SHA-1: a7c120c8eac05cffb61688fbe3aa91fb4cb4fdbc SHA-256: b4a02b0c5d067900ad7af9c62492b1885cf0db3f252b5a3445f8e0c37b39045d
82 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it's a lure for game hacks, specifically mentioning 'free robux'. The embedded URL points to a site offering such cheats, which is a common tactic for distributing malware or conducting phishing. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/roblox-free-robux-codes-card-game-hack PDF link annotation
    • http://perpustakaan.bkkbnkaltim.id/repository/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/can-pokemon-go-free-pokeballs_GM1094591345.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/free-roblox-app_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/7-year-old-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/roblox-com-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/free-robux-glitch_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/pubg-20210-uc-price_GM1330123889.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/free-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/coin-master-hacks-no-downloading_GM406889139.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/get-free-robux-website_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/roblox-promo-codes-2021-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/play-minecraft-online-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f87.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F87 25276 bytes
SHA-256: 86d97c48f6a8ed994fde64ae149da44cc3eb5e88e91e48f291e5495dc563ebfc
font_01_sfnt_off00008a62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A62 4156 bytes
SHA-256: 9579502deb19dcb791133efaa78e97f6a34da06970a69bce2517829ae7a724e0
font_02_sfnt_off00009810.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9810 18492 bytes
SHA-256: 7f008bbf1ce83c267f8742deafe460dfa81404cbc3d5f82591d06f41c70c7930

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