PDF malware analysis — malicious · ae71e881bee013f5

MALICIOUS

PDF

35.3 KB Created: 2021-07-08 10:29:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 9499ebd70e3918f76862a83c6ff3e3d3 SHA-1: 21392f7e3569cd8109b2e9dd71f1fca9def2468f SHA-256: ae71e881bee013f5fff0d8674fca421ab665f8e5d4351f2cb013bb5b5545002b

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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/free-spins-promo-code-for-coin-master-game-hack PDF link annotation
- https://www.stylafik.in/uploaded_files/userfiles/files/how-to-hack-knifes-in-assassin-roblox_GM431946152.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/no-scam-free-robux_GM431946152.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/free-free-robux_GM431946152.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/free-robux-master_GM431946152.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/free-designs-for-streamers-roblox_GM431946152.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/get-robux-com_GM431946152.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/coin-master-hack-tool-download_GM406889139.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/22-500-robux-free-2021_GM431946152.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/how-to-make-vip-server-in-roblox-for-free_GM431946152.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/how-to-get-free-knives-in-assassin-roblox-2021_GM431946152.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/roblox-hack-mobilenerator-net_GM431946152.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/how-to-use-cheat-engine-roblox_GM431946152.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/coin-master-free-spins-instagram_GM406889139.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/how-to-get-a-tiger-free-shard-seekers-roblox_GM431946152.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/coin-master-free-coins_GM406889139.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
`stream_002_off000031fa.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x31FA	23048 bytes
SHA-256: `b3429324e29680fae6c035cba345258189259421fc12221e7f835ffe0bf878d3`
`font_01_sfnt_off00006609.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6609	18760 bytes
SHA-256: `a7821f754938d289ff7484a252228733acad1063dc6dac6f619e23573f31c341`

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