Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b84bae11dcc1e7e…

MALICIOUS

PDF

44.0 KB Created: 2021-06-03 13:41:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 68457ebcea44a895fb821de03aa5ae00 SHA-1: 4abf51039b570c8152f061b22f5c3005f8576bc6 SHA-256: 4b84bae11dcc1e7e401e71144e8d46dd0775c6ac2b50f669eefda6256e1ec9c8
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document employs a lure for game hacks and generators, directing users to a known malicious redirector. The document also contains a call-to-action button and instructs users to copy/paste clipboard content, indicating a social engineering attempt to trick the user into executing a payload or visiting a malicious site. No scripts were extracted, but the embedded URLs and redirection behavior are strong indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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 https://netcdn.online/app/479516143/wurst-112-game-hack In PDF document text
    • http://library.stikessuakainsan.ac.id//repository/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/easy-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/coin-master-hack-2021-android_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/free-coin-master-spins-2021-link_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/coin-master-free-spins-save_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/roblox-character-free_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/robux-gratis_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/legit-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/free-spins-coin-master-november-2021_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_004_off000051dd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51DD 25300 bytes
SHA-256: 119ea754bd63f829428757a45828820a830d6a3bf9a7681a956b0d2a08dd257b
font_01_sfnt_off00008ad4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AD4 17788 bytes
SHA-256: ce3f60beb4de00bcffae905034889af3c96f4f191e5c47ffd96b019a9d508339

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