PDF malware analysis — malicious · cb80fc1f5d696eb4

MALICIOUS

PDF

43.8 KB Created: 2021-05-19 10:06:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 51c07529d099b978b7ff6c3c33afe250 SHA-1: ae4ecc0f712839dd9cc04fd3582d4a1ee6103829 SHA-256: cb80fc1f5d696eb401d49b6ed6058620898868477eadd6146fad72df9c1939fd

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file 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 0.9648

Heuristics 4

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/1330123889/pubg-10-000-uc-free-game-hack PDF link annotation
- https://www.similar.com.tw/upload/files/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/http-blackgamesus-coinmasterhack_GM406889139.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/how-do-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/pop-slots-free-vegas-casino-slot-machine-game-coin-master_GM406889139.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/free-coin-master-game_GM406889139.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/free-24-7-minecraft-server_GM479516143.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/coin-master-promo-code-2021_GM406889139.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/coin-master-hack-pro-gamers-com_GM406889139.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/free-minecraft-texture-packs-java_GM479516143.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/toolbox-for-minecraft-pe-mod-apk_GM479516143.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/roblox-website-robux_GM431946152.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/best-free-robux-sites_GM431946152.pdfIn PDF document text
- https://www.midasbuy.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_003_off00004636.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4636	25104 bytes
SHA-256: `194a522d6c346c16e898e7e60744bb04dd1c4f9d6d1483dc108b25b22cc46153`
`font_01_sfnt_off00007e9c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7E9C	2824 bytes
SHA-256: `94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4`
`font_02_sfnt_off0000884b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x884B	18340 bytes
SHA-256: `6628406491cffb0ec562a639dc1513122f5919ab31e749ca76d9466d90c9ba62`

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