PDF malware analysis — malicious · 1718af8a89680337

MALICIOUS

PDF

47.1 KB Created: 2021-06-13 19:47:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24

MD5: d748ff4a3828dc35ea4709a8406109b6 SHA-1: af56e7f4680c1df9f49a7495fd5ce433be6c89f4 SHA-256: 1718af8a89680337cdbc266f631b44edd7e7aba23df48c556e0fc5592ce8cccc

168 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as game hacks and generators. The document body and heuristics indicate a lure for popular games like Roblox and Minecraft, aiming to trick users into clicking these links. While no scripts were directly extracted, the PDF structure and embedded URLs strongly suggest a malicious redirection workflow, likely leading to further malware download or phishing.

Machine Learning

Nyx PDF Classifier malicious score 0.8948

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.
Urgency / deadline lure low SE_URGENCY_LURE

Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
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/roblox-mod-menu-hack-exploit-game-hack In PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/coin-master-hack-xyz-2021_GM406889139.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/how-to-hack-robux_GM431946152.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/free-robux-pastebin_GM431946152.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/minecraft-hacked-client_GM479516143.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/202100-free-spins-coin-master_GM406889139.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/free-spins-coin-master-twitter_GM406889139.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/coin-master-free-spins-save_GM406889139.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/como-hackear-juego-coin-master_GM406889139.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/minecraft-114-4-download-free_GM479516143.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/coin-master-hack-version-apk-download_GM406889139.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/roblox-games-with-free-boombox_GM431946152.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/free-robux-hack_GM431946152.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off00004a47.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4A47	26524 bytes
SHA-256: `8a66cce8d2265d5e81a7d928c6f0545a08890398f20794808249cae771db7a5c`
`font_01_sfnt_off0000868f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x868F	3884 bytes
SHA-256: `40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf`
`font_02_sfnt_off00009337.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9337	19092 bytes
SHA-256: `0f56e119ca8e29dacf3e5587427a0814eb9911462a8c0254a49e2caaa8359e84`

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