PDF malware analysis — malicious · ddb39e592dfb565f

MALICIOUS

PDF

34.7 KB Created: 2021-07-08 06:53:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24

MD5: 0e00531a0c55cde7034f1dd50bc2c319 SHA-1: 3274b70623371d8dbdf20ed9329786099886595b SHA-256: ddb39e592dfb565f9e5582b2b3009b4482160d00052186de9f6db2e2fa2d0d72

180 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to a known malicious redirector, disguised as a lure for free game currency or hacks. The document body explicitly contains the URL http://netcdn.tw/app/431946152/earn-free-robux-on-roblox-game-hack, which is flagged as malicious infrastructure. This suggests the document is part of a phishing or scam campaign designed to redirect users to potentially harmful websites.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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.
Callback phishing phone lure medium SE_CALLBACK_LURE

Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
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 http://netcdn.tw/app/431946152/earn-free-robux-on-roblox-game-hack In PDF document text
- https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-without-signing-up_GM431946152.pdfIn PDF document text
- https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
- https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/robux-cheat-2021_GM431946152.pdfIn PDF document text
- https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-generator-hack_GM406889139.pdfIn PDF document text
- https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-pet-treats-coin-master_GM406889139.pdfIn PDF document text
- https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-cbro-free-money-codes_GM431946152.pdfIn PDF document text
- https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-cheat-download_GM431946152.pdfIn PDF document text
- https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/mcpe-free-download_GM479516143.pdfIn PDF document text
- https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-cheat-cra-crusher_GM431946152.pdfIn PDF document text
- https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-2021-code_GM431946152.pdfIn PDF document text
- https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/my-roblox-account-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
- https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/a-free-trial-on-roblox_GM431946152.pdfIn PDF document text
- https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
- https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-coins-in-minecraft_GM479516143.pdfIn PDF document text
- https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
- https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-how-to-get-free-builders-club-2021_GM431946152.pdfIn PDF document text
- https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-dominus-free_GM431946152.pdfIn PDF document text
- https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/download-hack-roblox-2021-fr_GM431946152.pdfIn PDF document text
- https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-generator_GM431946152.pdfIn PDF document text
- https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-mac_GM479516143.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
`font_00_sfnt_off00003184.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3184	22424 bytes
SHA-256: `d2168495351698aee99a46a9396d56571b7bf00345b128553836e1ff4a2f3bf2`
`font_01_sfnt_off0000638b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x638B	18788 bytes
SHA-256: `af3555bc1f517b69886570aade67a9791766090da4e1e41d0d69d2926e00b478`

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