PDF malware analysis — malicious · 2ef241e3be5e700b

MALICIOUS

PDF

57.1 KB Created: 2021-05-12 00:49:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18

MD5: a002340e7936f99f86c37451b38a2dfe SHA-1: ab62d5db704dd76126d102c8711ae7b160b5f458 SHA-256: 2ef241e3be5e700b6f80467199bc1c6bd1a30b7688f1775b02b5ad6c6c0a39cb

142 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document employs a common lure of free game currency and hacks to entice users to click on external links. The primary link directs to a page promising 'free coin master spins', which itself appears to be a gateway to a large number of other SEO-optimized PDF files hosted on shivintech.com. This suggests a link-farming operation designed to drive traffic and potentially distribute further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.8254

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/free-coin-master-spins-no-human-verification-game-hack PDF link annotation
- http://www.shivintech.com/uploaded_files/userfiles/files/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
- http://www.shivintech.com/uploaded_files/userfiles/files/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
- http://www.shivintech.com/uploaded_files/userfiles/files/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
- http://www.shivintech.com/uploaded_files/userfiles/files/coin-master-hack-apk-35-11_GM406889139.pdfIn PDF document text
- http://www.shivintech.com/uploaded_files/userfiles/files/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
- http://www.shivintech.com/uploaded_files/userfiles/files/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
- http://www.shivintech.com/uploaded_files/userfiles/files/free-minecraft-server-hosting-24-7_GM479516143.pdfIn PDF document text
- http://www.shivintech.com/uploaded_files/userfiles/files/free-robux-no-scam_GM431946152.pdfIn PDF document text
- http://www.shivintech.com/uploaded_files/userfiles/files/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
- http://www.shivintech.com/uploaded_files/userfiles/files/is-coin-master-hacks-safe_GM406889139.pdfIn PDF document text
- http://www.shivintech.com/uploaded_files/userfiles/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
- http://www.shivintech.com/uploaded_files/userfiles/files/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
- http://www.shivintech.com/uploaded_files/userfiles/files/free-roblox-card-codes_GM431946152.pdfIn PDF document text
- http://www.shivintech.com/uploaded_files/userfiles/files/free-robux-pin-codes_GM431946152.pdfIn PDF document text
- http://www.shivintech.com/uploaded_files/userfiles/files/hacked-roblox-game_GM431946152.pdfIn PDF document text
- http://www.shivintech.com/uploaded_files/userfiles/files/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
- http://www.shivintech.com/uploaded_files/userfiles/files/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
- http://www.shivintech.com/uploaded_files/userfiles/files/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
- http://www.shivintech.com/uploaded_files/userfiles/files/free-25-spins-coin-master-links_GM406889139.pdfIn PDF document text
- http://www.shivintech.com/uploaded_files/userfiles/files/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off00004fce.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4FCE	27856 bytes
SHA-256: `26416ea8c9eefe15800d275b6b0eb766f8c871788007d7af6f6f3e0b8720d7c6`
`font_01_sfnt_off0000904d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x904D	3088 bytes
SHA-256: `e7854aff7cbc8fbdeb85d2b3d6248d12dc820ede8a581f4eac107fa6446c2222`
`font_02_sfnt_off00009b18.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9B18	7960 bytes
SHA-256: `cf7ae5cf6bef3222f5a26bec705b492fed0278aec6b16ec101aeda46e0edd2b2`
`font_03_sfnt_off0000ae3e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAE3E	18420 bytes
SHA-256: `6292f7fd9c783a708a29fdad24b2019f18fef79b6cfcf8f7eb350847db107d60`
`font_04_sfnt_off0000d086.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD086	4272 bytes
SHA-256: `fac9a06ceb5574feb8580c075df3ef69dfbd0efa4947186cfe90f11b68eaafb0`

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