Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bda1bac01d6a2a7…

MALICIOUS

PDF

34.8 KB Created: 2021-06-18 11:30:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: eb9355118f8fa7fdfffc3dc163158eb2 SHA-1: e832375919108b51f1dd9d7bdb2c6c304d00b674 SHA-256: 8bda1bac01d6a2a7896b48f52efdd021967b38584041d3363ca09234c46e2a32
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains embedded links that lead to a malicious redirector, likely intended to deliver a second-stage payload. The document body and heuristics indicate a lure related to game hacks and free currency, suggesting a phishing or scam attempt. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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.co/app/431946152/roblox-money-hack-apk-download-game-hack In PDF document text
    • https://lib.insan-unggul.ac.id/repository/pastebincom-raw-uf8dgrtm-free-robux-android_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/invicibility-roblox-hack_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/fly-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/can-users-on-roblox-make-free-hats_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/how-to-hack-roblox-tycoons-with-cheat-engine-64_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/free-coins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/minecraft-xbox-free_GM479516143.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/free-spin-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/coin-master-unlimited-spin-hack_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/how-to-get-free-roblox-items_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/free-robux-codes-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/freerobux-co_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/minecraft-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/coin-master-free-coins-app_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/free-custom-minecraft-skins_GM479516143.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_off00002fec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FEC 22080 bytes
SHA-256: 6fe15439f563ead6f04bb593f8adb6e65212fc39074847fc593c8753b597dfa7
font_01_sfnt_off00006100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6100 19716 bytes
SHA-256: 1271c3c1df0ef65ea95fea91775226145a0004baf45e08d432ae163ade82d2b3

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