Malicious PDF — malware analysis report

Static analysis result for SHA-256 164aac8681bd370b…

MALICIOUS

PDF

33.6 KB Created: 2021-07-09 19:03:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 1b4c8e359d055db309b3784e33b2c90c SHA-1: 8bbbeeacb30d93a28ee23e4eaa7664c6d9a2a7e3 SHA-256: 164aac8681bd370b71f85c224026306554413fd2d178df52847f169610eb4277
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to a known malicious redirector infrastructure, specifically advertising free in-game currency for Minecraft. The ML classifier strongly flagged this PDF as malicious. The presence of a download button lure and the overall theme of 'free game hacks' indicate a phishing or scam attempt designed to lead users to potentially harmful content.

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/479516143/minecraft-free-minecoins-game-hack In PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/is-robux-hack-real_GM431946152.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/roblox-meep-city-play-online-free_GM431946152.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/how-to-get-free-coins-in-roblox-murder-mystery-2_GM431946152.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/minecraft-bedrock-hacks-windows-10_GM479516143.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/can-you-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/coin-master-hacks-for-free-spins_GM406889139.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/free-catalog-roblox-java-script_GM431946152.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/is-minecraft-free-on-pc_GM479516143.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/cool-roblox-high-school-cheats_GM431946152.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/freerobux-co_GM431946152.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/free-nike-shirts-and-with-alpha-4-roblox_GM431946152.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/hackear-roblox-server_GM431946152.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/roblox-how-to-get-obc-for-free-lifetime_GM431946152.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/blackout-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/links-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/how-to-hack-coin-master-android_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
font_00_sfnt_off0000306a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x306A 22232 bytes
SHA-256: 11688721bb3e5a180bba7aafdb61e600775001beeb423cd01832ac2a1aa69ef4
font_01_sfnt_off000061b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61B2 17996 bytes
SHA-256: 2dfa5331a9f2119d54c4e551e8437d7962f745d427a4edb313ce7568aa6bc23b

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