PDF malware analysis — malicious · b997fec3af9f301a

MALICIOUS

PDF

40.6 KB Created: 2021-05-10 17:03:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18

MD5: 29ae47804e9b37c928038d885c28dc0a SHA-1: aabf17f4922ea823c6f35a1dd5109c283a3fb411 SHA-256: b997fec3af9f301ab04568a2110fed3214fa75e4150519e3facaa079193f4bd5

122 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. 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 0.9977

Heuristics 5

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.
Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA

Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
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.xyz/app/431946152/rblx-gg-free-robux-game-hack PDF link annotation
- https://roberto-gac.com/images/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
- https://roberto-gac.com/images/roblox-games-with-free-radio_GM431946152.pdfIn PDF document text
- https://roberto-gac.com/images/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
- https://roberto-gac.com/images/latest-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
- https://roberto-gac.com/images/coin-master-links-2021_GM406889139.pdfIn PDF document text
- https://roberto-gac.com/images/free-robux-rewards_GM431946152.pdfIn PDF document text
- https://roberto-gac.com/images/free-robux-without-offers_GM431946152.pdfIn PDF document text
- https://roberto-gac.com/images/master-free-spin-and-coin-links-html-m-1_GM406889139.pdfIn PDF document text
- https://roberto-gac.com/images/instantrobux_GM431946152.pdfIn PDF document text
- https://roberto-gac.com/images/minecraft-mod-updater_GM479516143.pdfIn PDF document text
- https://roberto-gac.com/images/coin-master-free-2021-spin-link-today_GM406889139.pdfIn PDF document text
- https://roberto-gac.com/images/coin-master-hack-xyz-apk-download_GM406889139.pdfIn PDF document text
- https://roberto-gac.com/images/coin-master-34-6-hack_GM406889139.pdfIn PDF document text
- https://roberto-gac.com/images/free-robux-scam_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
`stream_003_off0000421b.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x421B	24996 bytes
SHA-256: `58f191efc72933641484b57c88579cb4769f9f47ad0d8f9bfd718a63c6af38f2`
`font_01_sfnt_off00007c27.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7C27	18376 bytes
SHA-256: `79d8ff6bb54f2bd25fce5899da6b269aa8d0d1da5a030d2c5dfc49c812010b5b`

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