Malicious PDF — malware analysis report

Static analysis result for SHA-256 f567c6ce061dfdae…

MALICIOUS

PDF

41.8 KB Created: 2021-05-11 22:04:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 89ca1bb3bd614500575cd0149870dd08 SHA-1: 230f554c09ffc587da2878e82d0f818da68de054 SHA-256: f567c6ce061dfdaebdf8e5900451462892e796b984752008ed630e95da88e813
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are SEO-optimized to appear as 'free generators' or 'game hacks' for popular games. The document body, though truncated, suggests a lure related to Minecraft coloring pages. The presence of a 'remote-support tool lure' heuristic indicates a potential attempt to trick users into installing such software, possibly for further compromise. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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 https://netcdn.xyz/app/479516143/free-printable-minecraft-coloring-pages-game-hack PDF link annotation
    • https://lib.unitri.ac.id/repository/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/spin-link_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/free-roblox-followers-generator-2021_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/how-to-change-your-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-game-android-free-download_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-70-spin-link-2021_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/vip-roblox-free_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/100-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/how-to-get-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/roblox-free-play-no-download_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-hack-apk-2021-ios_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/minecraft-free-download-iphone_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-apk-hack-2021-ios_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_off000048ec.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48EC 24888 bytes
SHA-256: e3992415fff289e3fe9c5ae5bcc932d8d37eba6cdf10d5f9a8965d94b7225d5a
font_01_sfnt_off00008098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8098 18384 bytes
SHA-256: b54cebd8b2bbc40deba01da3a93219bb66384243215780ac353a5f98c97c66c1

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