Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fead57438e3325f…

MALICIOUS

PDF

34.4 KB Created: 2021-07-05 21:26:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 32d0a22838d24b19b8ed1e09b5b2ae97 SHA-1: ee9fe85df516e83873c00da00b897733e315b758 SHA-256: 6fead57438e3325f903370e63662625dc08d95c7feee002106eb60e39d24401f
180 Risk Score

Malware Insights

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

This PDF document contains multiple links to websites that are advertised as offering game hacks and free in-game currency, such as for Coin Master and Roblox. The document body and heuristics indicate these links are likely lures to malicious redirectors or directly host malicious files. The presence of a raw IP address in one of the URLs and the ML classification further support its malicious nature. The document's primary function appears to be directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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-hacks-game-hack In PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-robux-robloxlover_GM431946152.pdfPDF link annotation
    • http://111.68.26.74/widyapustaka/repository/free-robux-eu5_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-roblox-hacker-com-robucks_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/drive-through-restaurant-tycoon-roblox-hack_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-coins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/comment-hacker-roblox-mad-city-en-frencai_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-hack-on-roblox-deinsdaily_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/roblox-free-gamepass-hack_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/minecraft-windows-10-hacked-client_GM479516143.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/hack-adopt-me-roblox-download-script_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/mistplay-robux_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-stuff-on-roblox-on-computer_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-hack-the-underground-in-roblox_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/cheat-pour-roblox_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-spins-coin-master-app-iphone_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/codigos-para-hackear-cuentas-de-roblox_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_002_off000030bd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30BD 23020 bytes
SHA-256: 857a3e02a868b3ab76f4fd37964f17fecc3aa304bee38c2bd2c30ac5e5b51b88
font_01_sfnt_off0000646e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x646E 18004 bytes
SHA-256: 2f3a5855c5bac228d8d27cc7f61b57eebad79d58a924e470a0477843dff273c7

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