PDF malware analysis — malicious · e4f84944e3dd5e83

MALICIOUS

PDF

34.3 KB Created: 2021-07-19 02:56:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: 7efd86afc808488a4ba7234314bcf0ad SHA-1: d4c66709c6623722cd18dea4f07ddaf3b7b1666c SHA-256: e4f84944e3dd5e832686e1eb5378d2b2f81af9ed43f147e2f82414009b0a789c

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to a known malicious infrastructure, specifically advertising a 'coin master free generator'. The document body reinforces this lure with similar promises and a call to action. The ML classifier also flagged this PDF as malicious, indicating a high probability of malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9955

Heuristics 4

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.
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/406889139/coin-master-free-spins-link-today-game-hack In PDF document text
- https://pa-pangkalpinang.go.id/images/play-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
- https://pa-pangkalpinang.go.id/images/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
- https://pa-pangkalpinang.go.id/images/free-minecraft-bedrock-server-hosting_GM479516143.pdfIn PDF document text
- https://pa-pangkalpinang.go.id/images/can-you-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
- https://pa-pangkalpinang.go.id/images/minecraft-windows-10-hacked-client_GM479516143.pdfIn PDF document text
- https://pa-pangkalpinang.go.id/images/can-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
- https://pa-pangkalpinang.go.id/images/free-tiktok-fans-no-human-verification-or-downloading-apps_GM835599320.pdfIn PDF document text
- https://pa-pangkalpinang.go.id/images/minecraft-account-hacked_GM479516143.pdfIn PDF document text
- https://pa-pangkalpinang.go.id/images/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
- https://pa-pangkalpinang.go.id/images/coin-master-free-spins-2021_GM406889139.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_002_off00002db6.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x2DB6	23740 bytes
SHA-256: `ef7fa186a4d0dfeae3b5e916aba9a7d8d29b1ef161c0e750b466e666bf1b23ed`
`font_01_sfnt_off0000639b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x639B	18412 bytes
SHA-256: `ee277532c3187caf3da016130e4cbd3fee848ac0b1174d0f40fc16c12ed3c41d`

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