PDF malware analysis — malicious · eeae69fa19e4e6ca

MALICIOUS

PDF

48.1 KB Created: 2021-06-03 11:35:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16

MD5: aaa2a4af836e965f54bcc7b39b2e013c SHA-1: 2632b6d70736ee4bbbd5f8129ffdb52d49fddf30 SHA-256: eeae69fa19e4e6ca2eb46013a6dce1ed11a7a7c297ab0bb8b07bddf83c698530

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a common lure of free game hacks and spins to entice users. It contains numerous links, including a primary redirector to 'netcdn.online', which is flagged as malicious. The document also hosts a link farm pointing to various PDF files hosted on 'perpustakaan.ftk.uinib.ac.id', likely for SEO manipulation or to distribute further malicious content. While no scripts were explicitly extracted, the nature of the links and the ML classification suggest a high likelihood of further malicious activity, such as downloading a second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9796

Heuristics 5

PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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.
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
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/coin-master-heaven-free-spins-today-game-hack In PDF document text
- http://perpustakaan.ftk.uinib.ac.id/repository/free-shirt-templates-roblox_GM431946152.pdfIn PDF document text
- http://perpustakaan.ftk.uinib.ac.id//repository/roblox-hack-tool_GM431946152.pdfIn PDF document text
- http://perpustakaan.ftk.uinib.ac.id//repository/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
- http://perpustakaan.ftk.uinib.ac.id/repository/earn-free-spins-coin-master_GM406889139.pdfIn PDF document text
- http://perpustakaan.ftk.uinib.ac.id//repository/how-to-hack-coin-master-spin-ios_GM406889139.pdfIn PDF document text
- http://perpustakaan.ftk.uinib.ac.id//repository/minecraft-pe-free-download-android_GM479516143.pdfIn PDF document text
- http://perpustakaan.ftk.uinib.ac.id/repository/coin-master-real-hack_GM406889139.pdfIn PDF document text
- http://perpustakaan.ftk.uinib.ac.id/repository/coin-master-free-spin-and-coins-links-home_GM406889139.pdfIn PDF document text
- http://perpustakaan.ftk.uinib.ac.id/repository/bux-free-robux_GM431946152.pdfIn PDF document text
- http://perpustakaan.ftk.uinib.ac.id//repository/how-to-get-free-robux_GM431946152.pdfIn PDF document text
- http://perpustakaan.ftk.uinib.ac.id/repository/pokemon-go-free-pokecoins_GM1094591345.pdfIn PDF document text
- http://perpustakaan.ftk.uinib.ac.id/repository/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
- http://perpustakaan.ftk.uinib.ac.id//repository/roblox-character-free_GM431946152.pdfIn PDF document text
- http://perpustakaan.ftk.uinib.ac.id/repository/coin-master-card-collection-link_GM406889139.pdfIn PDF document text
- http://perpustakaan.ftk.uinib.ac.id/repository/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
- http://perpustakaan.ftk.uinib.ac.id/repository/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
- http://perpustakaan.ftk.uinib.ac.id/repository/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
- http://perpustakaan.ftk.uinib.ac.id//repository/minecraft-115-2-hacks_GM479516143.pdfIn PDF document text
- http://perpustakaan.ftk.uinib.ac.id/repository/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
- http://perpustakaan.ftk.uinib.ac.id/repository/free-spins-and-coins-blogspot-coin-master_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_004_off000054cf.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x54CF	26036 bytes
SHA-256: `49ba84bea16a5760786cfc6d63d5ad0bb1ed38ee7098433295bff2a611de16e0`
`font_01_sfnt_off00008efb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8EFB	2880 bytes
SHA-256: `b053084cafd01c649462d87667ba56c569d6480ce60e7d20ae57ef6124cf178e`
`font_02_sfnt_off000098e6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x98E6	18356 bytes
SHA-256: `60a5a430713f1161b8494f77535ec8b7c572fc0a829325370a59d32a1885166f`

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