PDF malware analysis — malicious · 0071d340e4087227

MALICIOUS

PDF

43.5 KB Created: 2021-05-13 12:03:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 2f73d99f2beefa4eb3b905543056812b SHA-1: fa0405eab23c0cc71b5fe9b728a2727cff3b7740 SHA-256: 0071d340e40872272f58e8dcd370c4f70f0bfb5bfdd93fd074e1764eb8323015

142 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one to a 'free generator / game hack' redirector, indicating a lure for users seeking cheats or exploits. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple SEO-optimized PDF links suggests a link farm designed to drive traffic to potentially harmful sites. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

Nyx PDF Classifier malicious score 0.9969

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/coin-master-free-spins-hack-download-game-hack PDF link annotation
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/how-to-hack-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/minecraft-bedrock-edition-free-with-java_GM479516143.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/how-to-get-free-spins-grom-coin-master_GM406889139.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/minecraft-pe-hacked-client-download_GM479516143.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/roblox-free-hats_GM431946152.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/coin-master-free-spins-whatsapp-link_GM406889139.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/free-coins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/free-robux-working_GM431946152.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/roblox-land-free-robux_GM431946152.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/master-coin-hack-mod_GM406889139.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/coin-master-hack-apk-april-12-2021_GM406889139.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/free-shirt-templates-roblox_GM431946152.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/free-minecraft-client_GM479516143.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/free-robux-human-verification_GM431946152.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/free-robux-codes-no-human-verification_GM431946152.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_003_off00004e28.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4E28	24528 bytes
SHA-256: `363f2f6909234e509df1a7a78a76cc3ef6862516550c6fb002b7d471a276aec1`
`font_01_sfnt_off000086bb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x86BB	18636 bytes
SHA-256: `da694bd0fa69da9f205a2bf67330739d542643c12690bfff988ed45d7c82aeae`

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