PDF malware analysis — malicious · c139c8bcdafc7d69

MALICIOUS

PDF

51.1 KB Created: 2021-06-03 12:27:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 1080b35e57472397673b8e5c73cb216f SHA-1: 56956b98692f03fdc83dc1fb4240cc4bfc360908 SHA-256: c139c8bcdafc7d69353a2ebc375a6053e43ec420c21c5b83a0def371a52471ed

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a high-severity heuristic firing for a game hack redirect lure, pointing to a suspicious URL. The ML classifier also flagged the PDF as malicious. While no scripts were extracted, the presence of an embedded URI and a download button lure suggests the document's primary purpose is to trick the user into visiting a malicious site.

Machine Learning

Nyx PDF Classifier malicious score 0.9724

Heuristics 4

PDF links to a 'free generator / game hack' redirector high 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.
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
External URI info PDF_URI

PDF contains an external URL action
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.online/app/1330123889/pubg-uc-low-price-game-hack PDF link annotation
- https://www.insol-europe.org/uploads/files/files/androeed-ru-minecraft_GM479516143.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/how-to-hack-on-roblox-huawei-tablet_GM431946152.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/robux-cheat_GM431946152.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/free-links-for-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/roblox-free-download_GM431946152.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/fb-coin-master_GM406889139.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/mcpe-master-unlimited-coins-free-download_GM406889139.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/coin-master-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/earn-free-robux-today_GM431946152.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/tiktok-likes-for-free_GM835599320.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/minecraft-ps3-free-download_GM479516143.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/coin-master-3533-android-hack_GM406889139.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/bloxpink-free-robux_GM431946152.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/coin-master-free-spins-link-quora_GM406889139.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_004_off0000507f.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x507F	31700 bytes
SHA-256: `97e5838dd20484134af3cd047f3a7816f4efa3cf26da3cdf26a73fcff3a1091a`
`font_01_sfnt_off00009b4a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9B4A	2816 bytes
SHA-256: `214f0b8c2b3c279476f862ae08d7e072944da5f6084cbd6130f0ffdc3460b614`
`font_02_sfnt_off0000a4f6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA4F6	18324 bytes
SHA-256: `b1c7707118672ae9d38847d2ca2a9058af9fa1259f1d6168006a7e6d5c49f1c5`

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