Malicious PDF — malware analysis report

Static analysis result for SHA-256 45df3e86d2af5340…

MALICIOUS

PDF

35.5 KB Created: 2021-07-06 09:33:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 7f0fb0e6054a8fef0cefb94eba710ac9 SHA-1: fc859d3a0239bfb32a86c02a8b6ebf702c2eb3f3 SHA-256: 45df3e86d2af534021eb72b08747d8f11becdf7fd89193eff5ac5e1c8021f3fa
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and game hack lures, indicating a phishing or scam attempt. The primary URL, http://netcdn.tw/app/431946152/how-to-hack-roblox-accounts-2021-easy-game-hack, is identified as a malicious redirector. The document's content and embedded links strongly suggest an attempt to trick users into visiting malicious sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.tw/app/431946152/how-to-hack-roblox-accounts-2021-easy-game-hack In PDF document text
    • http://perpus.polbitrada.ac.id/repository/roblox-cheat-money-download_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/android-fast-roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/wewgaming-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/mining-simulator-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/how-long-is-the-minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/roblox-exploit-super-nice-mml-hacks_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/roblox-how-to-get-25-robux-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/cheat-engine-tutorial-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/comment-avoir-un-wall-hack-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/minecraft-free-online-unblocked_GM479516143.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/how-to-get-free-followers-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/how-to-get-robux-for-free-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/hack-for-all-games-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/minecraft-free-education_GM479516143.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/cheat-roblox-jailbreak-money_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/febuary-2021-roblox-hacking-client_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_off00003175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3175 22532 bytes
SHA-256: 953706535d3e03f90912a18363bf68ae29008925dec04ee87c0352c327693ce5
font_01_sfnt_off00006380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6380 19644 bytes
SHA-256: 282628fc42a96e3279200ec8779d80ae4dcbec71e777bf135841d81b8694e155

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