PDF malware analysis — malicious · 3827d463f8b4c390

MALICIOUS

PDF

51.9 KB Created: 2021-06-03 16:00:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: 488411615fbc6eb91aa1b5d1cabc4772 SHA-1: 104a8e3db931b22eeaf9e4489c7f63e6804086e7 SHA-256: 3827d463f8b4c3901aa5510a8a444a32e33a573ae4927e0fb80a0fb47db39322

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 0.9657

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.online/app/406889139/master-coin-hack-mod-game-hack PDF link annotation
- https://learning.man3blitar.my.id/__statics/gudangsoal/files/how-to-change-your-username-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
- https://learning.man3blitar.my.id/__statics/gudangsoal/files/games-that-give-free-robux_GM431946152.pdfIn PDF document text
- https://learning.man3blitar.my.id/__statics/gudangsoal/files/collect-free-spin-linms-coin-master_GM406889139.pdfIn PDF document text
- https://learning.man3blitar.my.id/__statics/gudangsoal/files/coin-master-hack-safe_GM406889139.pdfIn PDF document text
- https://learning.man3blitar.my.id/__statics/gudangsoal/files/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
- https://learning.man3blitar.my.id/__statics/gudangsoal/files/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
- https://learning.man3blitar.my.id/__statics/gudangsoal/files/free-spins-coin-master-app-iphone_GM406889139.pdfIn PDF document text
- https://learning.man3blitar.my.id/__statics/gudangsoal/files/minecraft-world-free-download_GM479516143.pdfIn PDF document text
- https://learning.man3blitar.my.id/__statics/gudangsoal/files/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
- https://learning.man3blitar.my.id/__statics/gudangsoal/files/wwwcoin-master-hack-game-download_GM406889139.pdfIn PDF document text
- https://learning.man3blitar.my.id/__statics/gudangsoal/files/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
- https://learning.man3blitar.my.id/__statics/gudangsoal/files/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
- https://learning.man3blitar.my.id/__statics/gudangsoal/files/50-free-spins-coin-master-links_GM406889139.pdfIn PDF document text
- https://learning.man3blitar.my.id/__statics/gudangsoal/files/coin-master-free-spins-hack-no-human-verification_GM406889139.pdfIn PDF document text
- https://learning.man3blitar.my.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
- https://learning.man3blitar.my.id/__statics/gudangsoal/files/how-to-get-more-robux_GM431946152.pdfIn PDF document text
- https://learning.man3blitar.my.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
- https://learning.man3blitar.my.id/__statics/gudangsoal/files/wurst-client-18-9_GM479516143.pdfIn PDF document text
- https://learning.man3blitar.my.id/__statics/gudangsoal/files/coin-master-hack-apk_GM406889139.pdfIn PDF document text
- https://learning.man3blitar.my.id/__statics/gudangsoal/files/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off0000528e.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x528E	29692 bytes
SHA-256: `7424b1703bd201f56202f5378da364e29816d5407e78b25f27dd1ba23edac85a`
`font_01_sfnt_off00009179.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9179	4028 bytes
SHA-256: `a17c2a746d49ac23b23e38a371e32fddecfcd91b10cf42ff6155bff6b8a07e91`
`font_02_sfnt_off00009f19.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9F19	2788 bytes
SHA-256: `6fd7c7f447d66842f81aa8cf197935b17f22157d0c7e9f95622df1b5b4ddf530`
`font_03_sfnt_off0000a908.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA908	17888 bytes
SHA-256: `79663f5c6e364485b04b83db578590d29b6e1ee38eddb5c45b054f63581374ad`

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