PDF malware analysis — malicious · 2ebd20ce874f1f27

MALICIOUS

PDF

48.2 KB Created: 2021-05-14 08:09:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: b169810cbe80285393c795b22c3abf8e SHA-1: dd33444f944947e209624e85ddd2283389006362 SHA-256: 2ebd20ce874f1f273fa77b3bda35c3834c83ccb687873c61dfa64e35e9cd7cb7

142 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, 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 0.9013

Heuristics 5

Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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.xyz/app/431946152/free-robux-script-game-hack PDF link annotation
- https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
- https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
- https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-lucky-patcher-hack_GM406889139.pdfIn PDF document text
- https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
- https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
- https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
- https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/make-free-robux_GM431946152.pdfIn PDF document text
- https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-2021-app_GM406889139.pdfIn PDF document text
- https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/minecraft-free-download-windows-10_GM479516143.pdfIn PDF document text
- https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/haktuts-2021-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
- https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-premium-roblox_GM431946152.pdfIn PDF document text
- https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
- https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
- https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
- https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-coins-on-coin-master-generator_GM406889139.pdfIn PDF document text
- https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-spins-game-download_GM406889139.pdfIn PDF document text
- https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-daily-free-spins-blog_GM406889139.pdfIn PDF document text
- https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
- https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coinmaster-spins_GM406889139.pdfIn PDF document text
- https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/facebook-coin-master-hack_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_003_off00005001.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5001	26396 bytes
SHA-256: `9e008f6e4ac3334f67a5d26282d77323126cb08655176764f5715ca8435d5e79`
`font_01_sfnt_off00008caf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8CAF	5696 bytes
SHA-256: `450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139`
`font_02_sfnt_off000099c1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x99C1	18416 bytes
SHA-256: `7904477eb6282cb79bb1f8d95588be1a5283b3abf5667e30a4d761915d4b26ef`

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