PDF malware analysis — malicious · 41c6d4db76b2badf

MALICIOUS

PDF

48.0 KB Created: 2021-06-03 12:32:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18

MD5: ede8edf824454e67fbe6e8cf0354bd82 SHA-1: a9791c90e0be533695f69c81a866796f3ee502f6 SHA-256: 41c6d4db76b2badf5b06474b55d80fdac63be968dea37d2fbc9bb5fbe196d074

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9796

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/406889139/mcpe-master-unlimited-coins-free-download-game-hack PDF link annotation
- https://www.insol-europe.org/uploads/files/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/rbx-website_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/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/coin-master-free-link-daily_GM406889139.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/free-minecraft-skins-pe_GM479516143.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/free-robux-please_GM431946152.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/apps-for-free-robux_GM431946152.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/get-free-tiktok-followers_GM835599320.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/free-unlimited-robux_GM431946152.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/free-pet-food-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/coin-master-hacked-apk-download-for-android_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_off00005374.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5374	25736 bytes
SHA-256: `a1ef85e31e09866f7ef2fa81be8619f7b7bcbcc683412c18961d9f4467d4151c`
`font_01_sfnt_off00008d51.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8D51	2880 bytes
SHA-256: `10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132`
`font_02_sfnt_off0000973c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x973C	18912 bytes
SHA-256: `2495d9bbdfbd41392a26722b7d1029a4e9132e22aa6e9b8d4c4744142e94adf7`

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