Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff93ff25f27d674b…

MALICIOUS

PDF

34.1 KB Created: 2021-07-06 14:24:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 7cde4edafa16a2d848300738472557e6 SHA-1: 305604a997f96975f09330d3b7cb37c3a2a92b5f SHA-256: ff93ff25f27d674b59e7a188c02d1b41fe06634553b3413a399888bd52035c7f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising 'free generators' and 'game hacks'. The primary redirect URL is http://netcdn.tw/app/835599320/how-to-get-tiktok-followers-for-free-game-hack, which is flagged as a known malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a phishing or social engineering attempt to lure users to malicious content, likely for further exploitation or malware delivery.

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/835599320/how-to-get-tiktok-followers-for-free-game-hack In PDF document text
    • https://www.knjigebuducnosti.com/files/gta-5-roblox-money-hack_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/113-hacked-client_GM479516143.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/coin-master-hacks-no-surveys_GM406889139.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/free-private-server-roblox_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/how-to-get-java-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/robux-fun-hack_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/guess-the-song-cheat-sheet-roblox_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/how-to-get-free-obc-on-roblox-no-hacks_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/free-minecraft-maps-pe_GM479516143.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/minecraft-tools_GM479516143.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/free-private-minecraft-server_GM479516143.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/game-guardian-roblox-speed-hack_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/roblox-cs-go-aim-hack_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/op-rewards-free-robux_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_off000031ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31EF 22072 bytes
SHA-256: 8c81b14b7510d570a12115fbb73f311e6064635ac3d63361e3d34b74e9617f3c
font_01_sfnt_off000062d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D4 18208 bytes
SHA-256: bfe17cee51153b7a49e467cf5ec68e89f897660d59f72a19405ef6623fb9e504

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