PDF malware analysis — malicious · 6bfcdfe3cc08aec1

MALICIOUS

PDF

43.7 KB Created: 2021-05-14 23:37:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24

MD5: f95dd4ac6ee20e5237c49ee699caeba5 SHA-1: 36ba67876ca9cf8cdd0cab9f571dc4ba50ffd892 SHA-256: 6bfcdfe3cc08aec1e153119fdfa922edb0a6486b657237b937fbbb89871ae368

200 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to malicious redirector infrastructure, masquerading as free game currency generators and hacks. The ML classifier strongly flagged this PDF as malicious, and heuristics indicate brand impersonation for credential phishing. The primary malicious URL identified is https://netcdn.xyz/app/431946152/free-robux-com-2021-game-hack, which is part of a known malicious redirector chain.

Machine Learning

Nyx PDF Classifier malicious score 0.9969

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.
Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH

Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/431946152/free-robux-com-2021-game-hack.
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-com-2021-game-hack In PDF document text
- http://www.abilityireland.com/uploaded_files/userfiles/files/spin-and-coin-link_GM406889139.pdfIn PDF document text
- http://www.abilityireland.com/uploaded_files/userfiles/files/best-free-robux-sites_GM431946152.pdfIn PDF document text
- http://www.abilityireland.com/uploaded_files/userfiles/files/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
- http://www.abilityireland.com/uploaded_files/userfiles/files/village-coin_GM406889139.pdfIn PDF document text
- http://www.abilityireland.com/uploaded_files/userfiles/files/best-free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
- http://www.abilityireland.com/uploaded_files/userfiles/files/roblox-heroes-online_GM431946152.pdfIn PDF document text
- http://www.abilityireland.com/uploaded_files/userfiles/files/minecraft-pe-free-apk_GM479516143.pdfIn PDF document text
- http://www.abilityireland.com/uploaded_files/userfiles/files/roblox-free-roblox_GM431946152.pdfIn PDF document text
- http://www.abilityireland.com/uploaded_files/userfiles/files/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
- http://www.abilityireland.com/uploaded_files/userfiles/files/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
- http://www.abilityireland.com/uploaded_files/userfiles/files/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
- http://www.abilityireland.com/uploaded_files/userfiles/files/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
- http://www.abilityireland.com/uploaded_files/userfiles/files/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
- http://www.abilityireland.com/uploaded_files/userfiles/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
- http://www.abilityireland.com/uploaded_files/userfiles/files/get-gold-coin-master-village-hack_GM406889139.pdfIn PDF document text
- http://www.abilityireland.com/uploaded_files/userfiles/files/coin-master-free-spin-trick_GM406889139.pdfIn PDF document text
- http://www.abilityireland.com/uploaded_files/userfiles/files/free-roblox-hair-to-wear_GM431946152.pdfIn PDF document text
- http://www.abilityireland.com/uploaded_files/userfiles/files/free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
- http://www.abilityireland.com/uploaded_files/userfiles/files/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
- http://www.abilityireland.com/uploaded_files/userfiles/files/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
- https://collectrobux.coIn 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_off0000496d.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x496D	27664 bytes
SHA-256: `dbd977c29ab7a340e5d46a1c899bb00e1a555d3f2f1c85f22bdc0c3965db547b`
`font_01_sfnt_off0000874c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x874C	18676 bytes
SHA-256: `db7deb15448d884d15c6a42f746ab8a768d26593fd7e085f0109997e06cd96ff`

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