PDF malware analysis — malicious · 985aa1df2d549845

MALICIOUS

PDF

47.5 KB Created: 2021-05-15 09:37:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: 6b56cb0d078eef81d4adcee03afdc209 SHA-1: c10c53015f611beab2cadd31963f54c69579ee2b SHA-256: 985aa1df2d54984575b41d16a3376dd4d33d1fa2f05764eb52d75199d58ee515

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/406889139/como-hackear-el-juego-coin-master-en-espaol-game-hack PDF link annotation
- https://bengkellaskita.com/new/public/ckfinder/userfiles/files/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
- https://bengkellaskita.com/new/public/ckfinder/userfiles/files/free-links-coin-master_GM406889139.pdfIn PDF document text
- https://bengkellaskita.com/new/public/ckfinder/userfiles/files/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
- https://bengkellaskita.com/new/public/ckfinder/userfiles/files/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
- https://bengkellaskita.com/new/public/ckfinder/userfiles/files/how-to-get-roebucks_GM431946152.pdfIn PDF document text
- https://bengkellaskita.com/new/public/ckfinder/userfiles/files/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
- https://bengkellaskita.com/new/public/ckfinder/userfiles/files/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
- https://bengkellaskita.com/new/public/ckfinder/userfiles/files/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
- https://bengkellaskita.com/new/public/ckfinder/userfiles/files/free-coins-and-spins_GM406889139.pdfIn PDF document text
- https://bengkellaskita.com/new/public/ckfinder/userfiles/files/coin-master-spins_GM406889139.pdfIn PDF document text
- https://bengkellaskita.com/new/public/ckfinder/userfiles/files/http-blackgamesus-coinmasterhack_GM406889139.pdfIn PDF document text
- https://bengkellaskita.com/new/public/ckfinder/userfiles/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
- https://bengkellaskita.com/new/public/ckfinder/userfiles/files/how-to-o-get-free-coin-master-spins_GM406889139.pdfIn PDF document text
- https://bengkellaskita.com/new/public/ckfinder/userfiles/files/minecraft-windows-10-edition-free-download_GM479516143.pdfIn PDF document text
- https://bengkellaskita.com/new/public/ckfinder/userfiles/files/2021-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
- https://bengkellaskita.com/new/public/ckfinder/userfiles/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
- https://bengkellaskita.com/new/public/ckfinder/userfiles/files/free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
- https://bengkellaskita.com/new/public/ckfinder/userfiles/files/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
- https://bengkellaskita.com/new/public/ckfinder/userfiles/files/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
- https://bengkellaskita.com/new/public/ckfinder/userfiles/files/coin-master-hack-online-generator_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_off00004def.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4DEF	27464 bytes
SHA-256: `199aea1c65a8f53c5198a06744878369ff74eec148f3b8d970b328c7180023ee`
`font_01_sfnt_off00008c3f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8C3F	2840 bytes
SHA-256: `3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676`
`font_02_sfnt_off000095f0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x95F0	18820 bytes
SHA-256: `9083091ab5034e7f8b54d6ac024e3b26c7561895c47ec5e954bca62b6dbdf25d`

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