PDF malware analysis — malicious · b6db10751df0a2ce

MALICIOUS

PDF

45.5 KB Created: 2021-05-16 20:07:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27

MD5: 9ea1af9228c329d978002976e1f14bb4 SHA-1: 180041ba734a388e245e39af4bd7be56c5101675 SHA-256: b6db10751df0a2cefc0fddcecc0e319b3bac479b9fa5aca754bb4a1589d30e54

200 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and sites offering 'free game hacks' or 'generators', indicating a lure for users to visit potentially harmful content. The presence of a fake CAPTCHA heuristic further suggests an attempt to trick users into performing an action, likely leading to a malicious download or phishing attempt. No scripts were extracted, but the document's structure and embedded links strongly suggest a phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9507

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.
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
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/free-robux-safe-game-hack In PDF document text
- https://www.midrarreservations.com/uploaded_files/userfiles/files/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
- https://www.midrarreservations.com/uploaded_files/userfiles/files/coin-master-hack-september-2021_GM406889139.pdfIn PDF document text
- https://www.midrarreservations.com/uploaded_files/userfiles/files/rbx-sites_GM431946152.pdfIn PDF document text
- https://www.midrarreservations.com/uploaded_files/userfiles/files/hack-coin-master-spin-apk_GM406889139.pdfIn PDF document text
- https://www.midrarreservations.com/uploaded_files/userfiles/files/master-8-ball-pool-free-coins_GM406889139.pdfIn PDF document text
- https://www.midrarreservations.com/uploaded_files/userfiles/files/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
- https://www.midrarreservations.com/uploaded_files/userfiles/files/coin-master-attack-hack-apk_GM406889139.pdfIn PDF document text
- https://www.midrarreservations.com/uploaded_files/userfiles/files/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
- https://www.midrarreservations.com/uploaded_files/userfiles/files/coin-master-hack-2021-without-verification_GM406889139.pdfIn PDF document text
- https://www.midrarreservations.com/uploaded_files/userfiles/files/free-unlimited-robux_GM431946152.pdfIn PDF document text
- https://www.midrarreservations.com/uploaded_files/userfiles/files/hack-coins-in-coin-master_GM406889139.pdfIn PDF document text
- https://www.midrarreservations.com/uploaded_files/userfiles/files/coin-master-claim-spins_GM406889139.pdfIn PDF document text
- https://www.midrarreservations.com/uploaded_files/userfiles/files/free-spins-coin-master-links-no-human-verification_GM406889139.pdfIn PDF document text
- https://www.midrarreservations.com/uploaded_files/userfiles/files/daily-spin-and-coin_GM406889139.pdfIn PDF document text
- https://www.midrarreservations.com/uploaded_files/userfiles/files/coin-master-free-spins-link-2021-twitter_GM406889139.pdfIn PDF document text
- https://www.midrarreservations.com/uploaded_files/userfiles/files/coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
- https://www.midrarreservations.com/uploaded_files/userfiles/files/coin-master-free-gifts_GM406889139.pdfIn PDF document text
- https://www.midrarreservations.com/uploaded_files/userfiles/files/blox-fun-info_GM431946152.pdfIn PDF document text
- https://www.midrarreservations.com/uploaded_files/userfiles/files/free-spin-links-coin-master-october-30-2021_GM406889139.pdfIn PDF document text
- https://www.midrarreservations.com/uploaded_files/userfiles/files/get-free-roblox_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_off00004b44.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4B44	25144 bytes
SHA-256: `236b1669c74dd2c21c1dfc4301ea676b47a2b9cb3fde2ef42e713d6879023cd8`
`font_01_sfnt_off0000855d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x855D	2880 bytes
SHA-256: `10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132`
`font_02_sfnt_off00008f47.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8F47	18244 bytes
SHA-256: `393a0339ec2761f14ea9b29efa8c9c5fc9788b4979bd41a030a3ecef46023b5f`

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