Malicious PDF — malware analysis report

Static analysis result for SHA-256 b89c18dac49f02f7…

MALICIOUS

PDF

44.1 KB Created: 2021-06-13 22:18:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: fdb4f4a7457a31d69bfde5560bcebe3c SHA-1: ab3f1298d65e043721af856d4eeecc1d1767de6c SHA-256: b89c18dac49f02f7d0371cfb5ec6e64a0b701940c0d749482157e3583edf7d47
82 Risk Score

Malware Insights

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

The PDF document contains a high-risk heuristic indicating it links to a game hack redirector, specifically targeting users interested in Roblox and game currency. The primary malicious URL identified is http://netcdn.co/app/431946152/hacks-on-roblox-robux-game-hack, which likely serves as a lure to download further malware or engage in phishing. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to exploit user interest in free game items to deliver a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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/hacks-on-roblox-robux-game-hack PDF link annotation
    • https://digilib.stikesindramayu.ac.id/repository/wurst-115-2_GM479516143.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/mcpe-master-unlimited-coins-free-download_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/but-link-says-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-free-link-blogspot_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/guuuddinfo-get-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/clients-minecraft_GM479516143.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/gamekit-robux-for-free_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-get-free-hair-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/tiktok-free-view-iphone-apps_GM835599320.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/haktuts-coin-master-free-spin-link-today_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/fast-robux-online_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-village-4_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
stream_003_off000049c8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49C8 28204 bytes
SHA-256: 344e9386b59dcf56c76090302331a352c77b534ca70cbd3245e3e4d913f29ab4
font_01_sfnt_off00008a01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A01 18320 bytes
SHA-256: 255c1bd780d3a8b1558d41c45bd9dfb634d710668bb76a4d6bd59932fc7a2d48

Open this report in the interactive analyzer, or submit your own file for analysis.