Malicious PDF — malware analysis report

Static analysis result for SHA-256 23ea0168164a6bd4…

MALICIOUS

PDF

44.5 KB Created: 2021-05-17 04:51:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a4aa439749b4159f8e2573a30b28c4b7 SHA-1: d19ebee153dacf0058c26886185808552af1c84d SHA-256: 23ea0168164a6bd4232e4c01521e70e03325ac714952947f65357d8b1efaa43c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting 'free generator' or 'game hack' lures. The document body and extracted URLs indicate a social engineering tactic to trick users into visiting these sites, likely for further malware delivery or credential harvesting. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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/431946152/free-roblox-followers-generator-2021-game-hack In PDF document text
    • http://quatangthienthan.com/images/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://quatangthienthan.com/images/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • http://quatangthienthan.com/images/free-spins-on-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://quatangthienthan.com/images/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://quatangthienthan.com/images/robux-sites_GM431946152.pdfIn PDF document text
    • http://quatangthienthan.com/images/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://quatangthienthan.com/images/coin-master-free-spin-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • http://quatangthienthan.com/images/coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://quatangthienthan.com/images/coin-master-game-free-play-online_GM406889139.pdfIn PDF document text
    • http://quatangthienthan.com/images/coin-master-free-spin-download_GM406889139.pdfIn PDF document text
    • http://quatangthienthan.com/images/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • http://quatangthienthan.com/images/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
    • http://quatangthienthan.com/images/free-roblox-accounts-dantdm_GM431946152.pdfIn PDF document text
    • http://quatangthienthan.com/images/coin-master-hack-apk-ios-download_GM406889139.pdfIn PDF document text
    • http://quatangthienthan.com/images/claim-free-robux_GM431946152.pdfIn PDF document text
    • http://quatangthienthan.com/images/games-in-roblox-that-give-you-robux_GM431946152.pdfIn PDF document text
    • http://quatangthienthan.com/images/coin-master-cheats-for-free-spins_GM406889139.pdfIn PDF document text
    • http://quatangthienthan.com/images/free-robux-no-email_GM431946152.pdfIn PDF document text
    • http://quatangthienthan.com/images/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • http://quatangthienthan.com/images/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.micIn 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_off000048e7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48E7 28180 bytes
SHA-256: bb0946462f798116d7c720cab4423f7c37f8d5d445c5a1d0bc38ee05e8ee40e2
font_01_sfnt_off000089a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89A1 18844 bytes
SHA-256: 227474e1735e5d7697922269f160fae01492720ac9d8b6c0a7f07948ae0c6b44

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