Malicious PDF — malware analysis report

Static analysis result for SHA-256 f333eea65c8b9925…

MALICIOUS

PDF

43.6 KB Created: 2021-06-14 01:09:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ecb0248ab85f4e761d13a4166e52afaa SHA-1: ab51550ab35a14fb815bccd11cd1b276776f89bc SHA-256: f333eea65c8b99259d7c7e39366bb52e899aae28df539241f5b00627ac47aa58
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links and document body text that promote 'free Robux codes' and 'game hacks', directing users to a known malicious redirector. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to trick users into visiting malicious sites, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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-codes-apk-game-hack In PDF document text
    • https://digilib.stieama.ac.id/repository/get-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-free-robux-in-roblox-2021-ios_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-hack-someone-on-roblox-with-google-chrome_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/minecraft-xbox-one-edition-digital-code-free_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-rewards-link_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/cheat-roblox-tower-battle_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-games_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-cheats-and-hacks_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/download-minecraft-free-hiapphere_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/is-it-possible-to-get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-spin-coin-master-hacktoman_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/wurst-mc_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/fly-hack-roblox-mac_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • https://robuxhaxs.comIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004d67.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D67 25036 bytes
SHA-256: c5940a122f956de6404db39295a686e99402c3d68047a66eb5270308f6b1fe10
font_01_sfnt_off0000873a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x873A 18536 bytes
SHA-256: 9aa799274678e3e5a267a90213d9c0513b6710d9ce86a529fb2c681570679b2c

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