PDF malware analysis — malicious · 55b34f4d1ebb070c

MALICIOUS

PDF

48.4 KB Created: 2021-06-07 00:54:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 21067ae1b72d1f0b918e6c27fcc7fa0a SHA-1: 37343c581fd51bbe035aa621c52cf378cd9c83fc SHA-256: 55b34f4d1ebb070ca995594cd5cf66877e2e03a2a33dafc4a7e7c38c58d4b83c

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The document contains lures for an advance-fee scam, specifically related to 'free Robux' and game-related rewards. It embeds multiple URLs pointing to external websites, one of which is directly linked to the 'earn-free-robux' theme. The presence of embedded URLs and the advance-fee scam indicators strongly suggest a phishing or fraudulent scheme designed to trick users into visiting malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9796

Heuristics 4

Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE

Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
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.tw/app/431946152/earn-free-robux-by-watching-ads-game-hack
- http://www.gravel.ru/images/free-robux-codes-no-verification_GM431946152.pdf
- http://www.gravel.ru/images/coin-master-daily-free-spins-link-facebook_GM406889139.pdf
- http://www.gravel.ru/images/coin-master-gift-link_GM406889139.pdf
- http://www.gravel.ru/images/coin-master-hack-activegamer_GM406889139.pdf
- http://www.gravel.ru/images/coin-master-cheat-free_GM406889139.pdf
- http://www.gravel.ru/images/free-coins-on-coin-master_GM406889139.pdf
- http://www.gravel.ru/images/make-free-robux_GM431946152.pdf
- http://www.gravel.ru/images/tiktok-free-view-iphone-7-plus_GM835599320.pdf
- http://www.gravel.ru/images/minecraft-java-edition-for-free_GM479516143.pdf
- http://www.gravel.ru/images/coin-master-free-spins-link-fb_GM406889139.pdf
- http://www.gravel.ru/images/free-spins-for-coin-master-hack_GM406889139.pdf
- http://www.gravel.ru/images/free-coin-master-spins-2021_GM406889139.pdf
- http://www.gravel.ru/images/how-to-hack-coin-master_GM406889139.pdf
- http://www.gravel.ru/images/get-free-spins-coin-master-2021_GM406889139.pdf
- http://www.gravel.ru/images/free-robux-site_GM431946152.pdf
- http://www.gravel.ru/images/coin-master-free-spins-link-today-facebook_GM406889139.pdf
- http://www.gravel.ru/images/hey-google-how-do-you-get-free-robux_GM431946152.pdf
- http://www.gravel.ru/images/como-descargar-coin-master-hackeado_GM406889139.pdf
- http://www.gravel.ru/images/coin-master-hack-2021_GM406889139.pdf
- http://www.gravel.ru/images/robux-hack-me_GM431946152.pdf
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off00005058.bin` `0ecc308009c5fd99db94ae1347d680ef6f272c691e6ae3b64970d5248897ced7`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5058	27056 bytes
`font_01_sfnt_off00008ce3.bin` `10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8CE3	2880 bytes
`font_02_sfnt_off000096ce.bin` `f86f7dbe1df76ed0679c9d31fc61a4e6327db9e5e786615b1ce0697aafd9ee43`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x96CE	19472 bytes

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