PDF malware analysis — malicious · 43a48b9570ccb4f2

MALICIOUS

PDF

44.1 KB Created: 2021-06-03 07:12:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: 3de5d9960854a9a59a2a41c2d502c94b SHA-1: 092bfe58c72acb076b493e027af9600f166e35a9 SHA-256: 43a48b9570ccb4f281aeef8a9e7bff0c587a15ea73d1e58c678052b9d07e4e97

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 0.9865

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/coin-master-promo-code-2021-game-hack PDF link annotation
- https://emindonesia.com/assets/CKImages/files/coin-master-new-cards-hack_GM406889139.pdfIn PDF document text
- https://emindonesia.com/assets/CKImages/files/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
- https://emindonesia.com/assets/CKImages/files/how-to-setup-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
- https://emindonesia.com/assets/CKImages/files/coin-master-apk-hack-32_GM406889139.pdfIn PDF document text
- https://emindonesia.com/assets/CKImages/files/can-i-get-free-robux_GM431946152.pdfIn PDF document text
- https://emindonesia.com/assets/CKImages/files/free-coins-on-coin-master-generator_GM406889139.pdfIn PDF document text
- https://emindonesia.com/assets/CKImages/files/minecraft-free-demo_GM479516143.pdfIn PDF document text
- https://emindonesia.com/assets/CKImages/files/card-hack-for-coin-master_GM406889139.pdfIn PDF document text
- https://emindonesia.com/assets/CKImages/files/how-to-get-free-robux-without-human-verification-on-android_GM431946152.pdfIn PDF document text
- https://emindonesia.com/assets/CKImages/files/cm-free-spin-link-today_GM406889139.pdfIn PDF document text
- https://emindonesia.com/assets/CKImages/files/coinmaster-free-cards_GM406889139.pdfIn PDF document text
- https://emindonesia.com/assets/CKImages/files/coin-master-hack-without-downloading-apps_GM406889139.pdfIn PDF document text
- https://emindonesia.com/assets/CKImages/files/coin-master-time-hack-ios_GM406889139.pdfIn PDF document text
- https://emindonesia.com/assets/CKImages/files/dailyrobux_GM431946152.pdfIn PDF document text
- https://emindonesia.com/assets/CKImages/files/rape-simulator_GM431946152.pdfIn PDF document text
- https://emindonesia.com/assets/CKImages/files/how-to-hack-coin-master-ios_GM406889139.pdfIn PDF document text
- https://emindonesia.com/assets/CKImages/files/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
- https://emindonesia.com/assets/CKImages/files/free-robux-discord-servers_GM431946152.pdfIn PDF document text
- https://emindonesia.com/assets/CKImages/files/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
- https://emindonesia.com/assets/CKImages/files/can-pokemon-go-free-evolution_GM1094591345.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_004_off0000514b.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x514B	24364 bytes
SHA-256: `a55a6a44928fcf491eec78173f409ec7d19972a49113ebffcf4223625daf28ec`
`font_01_sfnt_off000088e8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x88E8	18536 bytes
SHA-256: `78ba75ad106ca8b847d5b6b00c40510cee8ee17e324b6b043c23b4765ae22915`

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