PDF malware analysis — malicious · d90b0ba905fe04dd

MALICIOUS

PDF

42.7 KB Created: 2021-05-16 21:03:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 512c934aa9f3a48dccab3b59b632c57a SHA-1: c4457f07ceec359063d93318eff03753d53db303 SHA-256: d90b0ba905fe04ddc4c68a1c07f695c56edad33ed0d1acd3afccbcd94692e219

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous links to external websites, many of which are algorithmically generated and point to resources related to game cheats and free in-game currency. The ML classifier and PDF link heuristics strongly indicate malicious intent, likely to direct users to phishing or malware distribution sites. No scripts were extracted, but the embedded URLs and document structure suggest a social engineering lure for initial access.

Machine Learning

Nyx PDF Classifier malicious score 0.9971

Heuristics 4

PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK

PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
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/431946152/sites-to-get-free-robux-game-hack
- https://ciptawiratirta.com/assets/CKImages/files/coin-master-time-speed-hack_GM406889139.pdf
- https://ciptawiratirta.com/assets/CKImages/files/www-coin-master-hack-xyz_GM406889139.pdf
- https://ciptawiratirta.com/assets/CKImages/files/coin-master-card-collection-link_GM406889139.pdf
- https://ciptawiratirta.com/assets/CKImages/files/instant-free-spins-coin-master_GM406889139.pdf
- https://ciptawiratirta.com/assets/CKImages/files/freespinandcoinblogspotcom-2021-11-coinmasterfreespinandcoinlinkshtml_GM406889139.pdf
- https://ciptawiratirta.com/assets/CKImages/files/coin-master-free-spin-link-app_GM406889139.pdf
- https://ciptawiratirta.com/assets/CKImages/files/coin-master-latest-mod-apk-free-download_GM406889139.pdf
- https://ciptawiratirta.com/assets/CKImages/files/easy-ways-to-get-free-robux_GM431946152.pdf
- https://ciptawiratirta.com/assets/CKImages/files/login-robux_GM431946152.pdf
- https://ciptawiratirta.com/assets/CKImages/files/irobux-com-redeem_GM431946152.pdf
- https://ciptawiratirta.com/assets/CKImages/files/roblox-account-taker_GM431946152.pdf
- https://ciptawiratirta.com/assets/CKImages/files/www-robux-com_GM431946152.pdf
- https://ciptawiratirta.com/assets/CKImages/files/com-roblox_GM431946152.pdf
- https://ciptawiratirta.com/assets/CKImages/files/coin-master-game-hacking_GM406889139.pdf
- https://ciptawiratirta.com/assets/CKImages/files/free-robux-without-human-verification-real_GM431946152.pdf
- https://ciptawiratirta.com/assets/CKImages/files/how-to-get-to-village-3-in-coin-master_GM406889139.pdf
- https://ciptawiratirta.com/assets/CKImages/files/roblox-free-items-glitch_GM431946152.pdf
- https://ciptawiratirta.com/assets/CKImages/files/coin-master-coins-hack_GM406889139.pdf
- https://ciptawiratirta.com/assets/CKImages/files/free-coin-master-spins-2021_GM406889139.pdf
- https://ciptawiratirta.com/assets/CKImages/files/coin-master-hack-apk-download-for-android_GM406889139.pdf
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off00004a51.bin` `a4fad490899127c1d89d58edd08c9208ced0653e87fa2b71710c5c2642c8a051`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4A51	25136 bytes
`font_01_sfnt_off000084df.bin` `b3c6e6b81f0aade665b3e9e34fb665158f9d1803db8458128eb468a961d6d74b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x84DF	18236 bytes

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