Malicious PDF — malware analysis report

Static analysis result for SHA-256 457263f2af001c72…

MALICIOUS

PDF

42.2 KB Created: 2021-05-15 17:34:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 4aff94930126407b9c7c040f884ec234 SHA-1: f0df735a81643202cb36b5936bc10f7914a784e0 SHA-256: 457263f2af001c724a03aa3c225e2eecbd7ba50484bc41aad2f9f7d6c72d2f85
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell T1203 Exploitation for Client Execution

This PDF document employs a 'game hack' lure to trick users into executing commands. It contains multiple links to known malicious redirectors and instructs the user to copy and paste content into a shell, a common technique for downloading and executing second-stage payloads. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/479516143/how-to-get-minecraft-for-free-on-android-game-hack In PDF document text
    • http://solidcommunication.ch/images/how-to-hack-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://solidcommunication.ch/images/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://solidcommunication.ch/images/static-moonactive-net-rewards-2021_GM406889139.pdfIn PDF document text
    • http://solidcommunication.ch/images/minecraft-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://solidcommunication.ch/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://solidcommunication.ch/images/coin-blogspot_GM406889139.pdfIn PDF document text
    • http://solidcommunication.ch/images/coin-master-hack-2021-without-verification_GM406889139.pdfIn PDF document text
    • http://solidcommunication.ch/images/coin-master-hack-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://solidcommunication.ch/images/can-you-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://solidcommunication.ch/images/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://solidcommunication.ch/images/robux-place-rewards_GM431946152.pdfIn PDF document text
    • http://solidcommunication.ch/images/fighting-free-card-coin-master_GM406889139.pdfIn PDF document text
    • http://solidcommunication.ch/images/daily-coin-master-free-spin-link-facebook_GM406889139.pdfIn PDF document text
    • http://solidcommunication.ch/images/coin-master-ios-gods-hack_GM406889139.pdfIn PDF document text
    • http://solidcommunication.ch/images/coin-master-game-2021-free-spin-link_GM406889139.pdfIn PDF document text
    • http://solidcommunication.ch/images/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://solidcommunication.ch/images/coin-master-link-for-spins_GM406889139.pdfIn PDF document text
    • http://solidcommunication.ch/images/free-spin-links-coin-master-october-30-2021_GM406889139.pdfIn PDF document text
    • http://solidcommunication.ch/images/mcpe-download_GM479516143.pdfIn PDF document text
    • http://solidcommunication.ch/images/free-robux-generator-2021_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
stream_003_off00004ac9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AC9 25172 bytes
SHA-256: 45a4abc7eb2c913535e202d32eebaf4219d9621f4e9678b221782fb102a21275
font_01_sfnt_off00008355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8355 18048 bytes
SHA-256: 8059851acc98585c267d1a0730441da2490f7a27bb6efaac05b05bf58a4bb166

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