Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f55f227c981cb2f…

MALICIOUS

PDF

35.7 KB Created: 2021-07-05 17:30:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 6965b2e306477b45a471af9efda1de38 SHA-1: fd91fa970788d8351aaff77ead5b919d201d02c6 SHA-256: 6f55f227c981cb2fe81cd22198fdbc29b1dffc698fdaa3f49f8899fb4e31ce86
240 Risk Score

Malware Insights

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

The PDF document contains multiple links to websites offering "hacks" and "generators" for popular games, with a primary redirector identified as malicious. The document body and heuristics indicate a social engineering lure designed to trick users into clicking these links, potentially leading to malware downloads or phishing. While no scripts were explicitly extracted, the nature of the links and the "ClickFix" heuristic suggest an attempt to bypass security controls by directing the user to execute commands or visit malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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
  • 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.tw/app/406889139/coin-master-hack-co-game-hack In PDF document text
    • http://librarystkippgribl.com//repository/roblox-hacking-website_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-spin-coin-master-online_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/minecraft-pe-hack-client-2021_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/www-free-robux_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/hacker-minecraft-song_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/pokemon-go-free-2021_GM1094591345.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/mathep_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/master-game_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/coin-master-free-generator_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/hacker-des-personne-sur-roblox-pc_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-games-like-coin-master_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/robux-hack-no-download-no-survey-no-human-verification_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-robux-roblox-game-image_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/pubg-uc-kaise-khariden_GM1330123889.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/copy-and-paste-to-terminal-robux-hack_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/gamepass-me-free-robux_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
font_00_sfnt_off000034c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34C0 23452 bytes
SHA-256: b97368fd905b71eee6406a994cb9714777570d1b1206a0b59e4613e2a3bd111f
font_01_sfnt_off000069bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69BD 18004 bytes
SHA-256: 2f3a5855c5bac228d8d27cc7f61b57eebad79d58a924e470a0477843dff273c7

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