Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9a6985587801256…

MALICIOUS

PDF

34.5 KB Created: 2021-06-27 10:13:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8bcaabf436a91cda6fe121b13544763a SHA-1: 8f5b61d560f1d8c406cd69fbe3182ea7469c1ddd SHA-256: a9a69855878012566a4c69c2383257ccb690a9cf17b4c30887fdeda2c527977c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links and text related to obtaining free Robux and game hacks, strongly suggesting a phishing or malware distribution lure. The ML classifier flagged this PDF with high confidence, and the presence of embedded URLs further supports a malicious intent to redirect users to potentially harmful content. Although no scripts were explicitly extracted, the document's structure and content align with a social engineering attack aiming to trick users into downloading unwanted software or visiting malicious sites.

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 http://netcdn.co/app/431946152/how-to-get-free-robux-instantly-free-robux-hack-game-hack In PDF document text
    • https://htdvn.com/public/upload/files/is-it-hacking-if-i-use-autoclicker-in-roblox_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/hack-version-of-coin-master_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-shavaka-roblox-id_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/roblox-hacks-xray-2021_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/how-to-hack-money-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/minecraft-classic-free_GM479516143.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/wwwcoin-master-free-spincom_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-minecraft-accounts-2021_GM479516143.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/roblox-northern-frontier-hack_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/roblox-promo-codes-list-free_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/coin-master-hack-spins-apk_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/how-to-get-free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002eb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EB6 22356 bytes
SHA-256: feefb0930f269ac073fc20da3e1e31b6e1b5cbab2de0d2aa3e3788b8667616ba
font_01_sfnt_off00006080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6080 19408 bytes
SHA-256: f8bded380932781466b45b09ad33f869ae5957a50232801bb772b5578ced684b

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