PDF malware analysis — malicious · 88e07797203e2fa4

MALICIOUS

PDF

44.5 KB Created: 2021-06-09 05:14:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22

MD5: 0a92ddf83aff6e5fa1fd233cf55c1736 SHA-1: 17b25b3a77564b405f1c333e82b93ecb735c74f2 SHA-256: 88e07797203e2fa4d4333fbe3e29bec6a640e3d5e3639f21981c6f7632fc94a6

180 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to a known malicious redirector, masquerading as a 'free generator' or 'game hack' for Robux. The document body, though heavily obfuscated, contains references to the same lure. The presence of these links and the ML classifier's high confidence score indicate a phishing or scam attempt designed to lead users to malicious infrastructure.

Machine Learning

Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.tw/app/431946152/ww-robux-hack-top-game-hack In PDF document text
- https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
- https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/i-will-give-you-free-robux_GM431946152.pdfIn PDF document text
- https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
- https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
- https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/download-minecraft-free-hiapphere_GM479516143.pdfIn PDF document text
- https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-tiktok-followers-no-human-verification-or-survey-2021_GM835599320.pdfIn PDF document text
- https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-bux-free_GM431946152.pdfIn PDF document text
- https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
- https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-just-click_GM431946152.pdfIn PDF document text
- https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-free-login_GM431946152.pdfIn PDF document text
- https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
- https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
- https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-youtube-tiktok_GM835599320.pdfIn PDF document text
- https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-roblox-hair-girl_GM431946152.pdfIn PDF document text
- https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
- https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/tiktok-free-6-months_GM835599320.pdfIn PDF document text
- https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-download-hack-ios_GM406889139.pdfIn PDF document text
- https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/games-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-bloxburg-free-money_GM431946152.pdfIn PDF document text
- https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/get-free-robux_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_004_off00005274.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5274	24172 bytes
SHA-256: `9d6d54683f037b6b6f93f76e4bd12be15b11281645de3588cbe83fdebe0e6e3c`
`font_01_sfnt_off000089ae.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x89AE	18784 bytes
SHA-256: `ce9d954540a9ab5ae43ace08e42dc4a42120c58ce6056c0e6287646d7283671e`

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