PDF malware analysis — malicious · 437733ae0ad994b6

MALICIOUS

PDF

47.6 KB Created: 2021-06-03 06:59:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05

MD5: 06796958cf1eb77304501b8efc8d722d SHA-1: 64fc106bbf59318755b114accbee36f903efefce SHA-256: 437733ae0ad994b68767c4382424b0ac77a230983a0f9133ca3fe7e320eee3a8

182 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. It uses brand-impersonation credential phishing. 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 0.9769

Heuristics 6

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.
Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH

Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.online/app/431946152/how-you-get-robux-game-hack.
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/431946152/how-you-get-robux-game-hack PDF link annotation
- http://perpustakaan.dutadharma.ac.id/repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
- http://perpustakaan.dutadharma.ac.id/repository/free-tiktok-fans-app_GM835599320.pdfIn PDF document text
- http://perpustakaan.dutadharma.ac.id/repository/free-coins-and-spins-link-for-coin-master_GM406889139.pdfIn PDF document text
- http://perpustakaan.dutadharma.ac.id/repository/get-free-robux-gg_GM431946152.pdfIn PDF document text
- http://perpustakaan.dutadharma.ac.id/repository/coin-master-hack-online-generator-without-human-verification_GM406889139.pdfIn PDF document text
- http://perpustakaan.dutadharma.ac.id/repository/minecraft-pe-016-0-apk-download-free_GM479516143.pdfIn PDF document text
- http://perpustakaan.dutadharma.ac.id/repository/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
- http://perpustakaan.dutadharma.ac.id/repository/coin-master-free-100-spin-link_GM406889139.pdfIn PDF document text
- http://perpustakaan.dutadharma.ac.id/repository/coin-master-34-6-hack_GM406889139.pdfIn PDF document text
- http://perpustakaan.dutadharma.ac.id/repository/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- http://perpustakaan.dutadharma.ac.id/repository/free-robux-just-enter-username_GM431946152.pdfIn PDF document text
- http://perpustakaan.dutadharma.ac.id/repository/how-to-hack-roblox_GM431946152.pdfIn PDF document text
- http://perpustakaan.dutadharma.ac.id/repository/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
- http://perpustakaan.dutadharma.ac.id/repository/coin-master-free-spin-realme-products_GM406889139.pdfIn PDF document text
- http://perpustakaan.dutadharma.ac.id/repository/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
- http://perpustakaan.dutadharma.ac.id/repository/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
- http://perpustakaan.dutadharma.ac.id/repository/minecraft-windows-10-edition-free_GM479516143.pdfIn PDF document text
- http://perpustakaan.dutadharma.ac.id/repository/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
- http://perpustakaan.dutadharma.ac.id/repository/free-coin-master-spins-link-download_GM406889139.pdfIn PDF document text
- http://perpustakaan.dutadharma.ac.id/repository/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
- https://www.communes.comIn 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_off0000525d.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x525D	25672 bytes
SHA-256: `d4f2d7b162881fa5f0852a9dc67b5b71ef88fad338757f61002edb4ec1d3d696`
`font_01_sfnt_off00008d1b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8D1B	2880 bytes
SHA-256: `b053084cafd01c649462d87667ba56c569d6480ce60e7d20ae57ef6124cf178e`
`font_02_sfnt_off00009706.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9706	18280 bytes
SHA-256: `da9d84f1cd45b5ac6ec9aefdd652d6bdce11e542494ae2da0581909ee8565979`

Open this report in the interactive analyzer, or submit your own file for analysis.