PDF malware analysis — malicious · aa28e9be162332e9

MALICIOUS

PDF

35.4 KB Created: 2021-07-04 11:45:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: a6fc38e73f1a369cf8bc1ecb6421771f SHA-1: 9c1dacf17629e995558f5b3b8c2fd4bbca64ee4a SHA-256: aa28e9be162332e9495d2bf3203a59ea510dba9f4c9b14ddfd101efbf405afdc

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic indicating it links to a 'game hack' lure, directing users to the URL http://netcdn.tw/app/406889139/coin-master-hack-version-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a social engineering tactic to redirect users to potentially malicious content, likely for credential harvesting or malware delivery. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 4

PDF links to a 'free generator / game hack' redirector high 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.
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
External URI info PDF_URI

PDF contains an external URL action
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-version-game-hack PDF link annotation
- https://zustsearch.com/uploaded_files/userfiles/files/roblox-royale-high-halo-hack_GM431946152.pdfIn PDF document text
- https://zustsearch.com/uploaded_files/userfiles/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
- https://zustsearch.com/uploaded_files/userfiles/files/roblox-free-tshirt-2021_GM431946152.pdfIn PDF document text
- https://zustsearch.com/uploaded_files/userfiles/files/rbx-website_GM431946152.pdfIn PDF document text
- https://zustsearch.com/uploaded_files/userfiles/files/free-minecraft-skin-creator_GM479516143.pdfIn PDF document text
- https://zustsearch.com/uploaded_files/userfiles/files/roblox-source_GM431946152.pdfIn PDF document text
- https://zustsearch.com/uploaded_files/userfiles/files/roblox-admin-hack-2021_GM431946152.pdfIn PDF document text
- https://zustsearch.com/uploaded_files/userfiles/files/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
- https://zustsearch.com/uploaded_files/userfiles/files/boku-no-roblox-remastered-roblox-hack-scripts_GM431946152.pdfIn PDF document text
- https://zustsearch.com/uploaded_files/userfiles/files/free-robux-genenger_GM431946152.pdfIn PDF document text
- https://zustsearch.com/uploaded_files/userfiles/files/free-minecraft-hacks_GM479516143.pdfIn PDF document text
- https://zustsearch.com/uploaded_files/userfiles/files/cheat-engine-hacks-roblox_GM431946152.pdfIn PDF document text
- https://zustsearch.com/uploaded_files/userfiles/files/increible-hack-robux-pastebincom-80b1sjzp-davidtoasa_GM431946152.pdfIn PDF document text
- https://zustsearch.com/uploaded_files/userfiles/files/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://zustsearch.com/uploaded_files/userfiles/files/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
- https://zustsearch.com/uploaded_files/userfiles/files/free-100-robux_GM431946152.pdfIn PDF document text
- https://zustsearch.com/uploaded_files/userfiles/files/coin-master-firebird-card-free_GM406889139.pdfIn PDF document text
- https://zustsearch.com/uploaded_files/userfiles/files/free-robux-100-true_GM431946152.pdfIn PDF document text
- https://zustsearch.com/uploaded_files/userfiles/files/roblox-dragonball-cheat-engine_GM431946152.pdfIn PDF document text
- https://zustsearch.com/uploaded_files/userfiles/files/free-robux-obby-youtube_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.

Filename	Kind	Source	Size
`font_00_sfnt_off00003546.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3546	22680 bytes
SHA-256: `a5a2047369c253d83b20a390875dfc1ef3cc89f3c5badb4b13aa788ae497d031`
`font_01_sfnt_off000067fe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x67FE	18140 bytes
SHA-256: `503563be678171a85d5e5a9d7aece18bf67972ce993f3ff3d264913f79314b46`

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