Malicious PDF — malware analysis report

Static analysis result for SHA-256 68abc0d9e95df2f5…

MALICIOUS

PDF

52.5 KB Created: 2021-06-09 16:32:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 2e20033a5dcd10c2da9c98c489d6b81d SHA-1: 361365b4380e28f6a45cb621965c3288428681ef SHA-256: 68abc0d9e95df2f543b67a7f0007792363e5021dccf56e41cb0fbe536775523b
280 Risk Score

Malware Insights

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

The PDF document contains multiple links to malicious redirectors, masquerading as game hacks or generators, and impersonates brands like Microsoft. The document body and heuristics indicate a social engineering lure, specifically a 'ClickFix' attack, instructing the user to copy and paste commands into a shell. This suggests the intent is to trick the user into executing arbitrary commands, likely leading to further payload download and execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9856

Heuristics 7

  • 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
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.tw/app/431946152/how-to-change-your-roblox-username-free-game-hack.
  • 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.tw/app/431946152/how-to-change-your-roblox-username-free-game-hack In PDF document text
    • http://elib.acls-indonesia.com/repository/minecraft-windows-10-free-trial_GM479516143.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/roblox-account-hacker-tool_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/is-coin-master-free_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/how-to-hack-coin-master-with-game-guardian_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/roblox-free-in-the-computer_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/minecraft-java-free-download_GM479516143.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/cheats-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-tiktok-accounts-and-passwords_GM835599320.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/how-to-make-a-group-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/coin-master-homepage_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/coin-master-tool-hack_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/how-to-get-minecraft-windows-10-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-coins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/how-to-hack-roblox-with-cookie-editor_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-robux-robux-game_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/coin-master-sound-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/how-to-get-robux-for-free-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_004_off00005614.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5614 38032 bytes
SHA-256: b0dfe4272ecaf3faf772d0d83a4ccf7493b7d8c4c25e8ca099552d7913c2bb47
font_01_sfnt_off0000a7d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7D3 19540 bytes
SHA-256: 50ecf7285bea5802cb0b20a8b9fdcfe95df60a9d9ebe9d63dbff9f8e980eaa15