PDF malware analysis — malicious · 155162de32c5e997

MALICIOUS

PDF

48.8 KB Created: 2021-06-09 02:56:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 6bd7a1bf0d67efb1d103877c40c6709f SHA-1: 85aee76f1de00316bfcab807c427e1e264225d5a SHA-256: 155162de32c5e9971a2a6205601ba5ef8226b6e7a83f3fa8bcddca03422652ba

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 0.9796

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 https://netcdn.tw/app/431946152/robux-cheats-that-work-game-hack PDF link annotation
- https://goodtools.tw/upload/files/coin-master-free-food_GM406889139.pdfIn PDF document text
- https://goodtools.tw/upload/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
- https://goodtools.tw/upload/files/coin-master-apk-mod_GM406889139.pdfIn PDF document text
- https://goodtools.tw/upload/files/watch-ads-for-robux_GM431946152.pdfIn PDF document text
- https://goodtools.tw/upload/files/rblx-city-free-robux_GM431946152.pdfIn PDF document text
- https://goodtools.tw/upload/files/roblox-hack-2021_GM431946152.pdfIn PDF document text
- https://goodtools.tw/upload/files/pubg-uc-qiymeti_GM1330123889.pdfIn PDF document text
- https://goodtools.tw/upload/files/games-like-coin-master_GM406889139.pdfIn PDF document text
- https://goodtools.tw/upload/files/where-to-find-free-items-on-roblox_GM431946152.pdfIn PDF document text
- https://goodtools.tw/upload/files/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
- https://goodtools.tw/upload/files/free-robux-codes-generator_GM431946152.pdfIn PDF document text
- https://goodtools.tw/upload/files/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
- https://goodtools.tw/upload/files/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
- https://goodtools.tw/upload/files/coin-master-free-gift-cards_GM406889139.pdfIn PDF document text
- https://goodtools.tw/upload/files/fighting-free-card-coin-master_GM406889139.pdfIn PDF document text
- https://goodtools.tw/upload/files/coin-master-mod-apk-unlimited-spin-download-free-full-version_GM406889139.pdfIn PDF document text
- https://goodtools.tw/upload/files/coin-master-free-cards-and-spin-link_GM406889139.pdfIn PDF document text
- https://goodtools.tw/upload/files/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
- https://goodtools.tw/upload/files/tiktok-free-fans-and-likes_GM835599320.pdfIn PDF document text
- https://goodtools.tw/upload/files/coin-master-app_GM406889139.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_004_off000051b1.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x51B1	27240 bytes
SHA-256: `ebde8957a4f9524d9d4b58f05df003c3c53a8353c1895f6d17373cd41b9e91f9`
`font_01_sfnt_off00009118.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9118	2812 bytes
SHA-256: `fc92a80cefddbcc51cb4ecd7284aa73b746cbd66adcf1d96110f0323ec06b51f`
`font_02_sfnt_off00009ab8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9AB8	18716 bytes
SHA-256: `4947e4fcd0b4cc4a6b8ab628bb6f5cae44c76e019d4e449aee25250b8703c326`

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