PDF malware analysis — malicious · cfd28c0ee7b65154

MALICIOUS

PDF

44.5 KB Created: 2021-06-10 21:41:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27

MD5: 6072aaab18e9306a2c427ad931232846 SHA-1: d671a8300ad07b5ec8a52ac343bbc2785b42fc51 SHA-256: cfd28c0ee7b65154e2c18ae1f4b60ec8713299b144977eb2caf2fb73366387a0

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The document contains numerous embedded URLs pointing to sites offering game hacks and free currency, strongly suggesting a lure for users to download malicious files. The presence of a 'password-protected archive' heuristic indicates that the downloaded content is likely encrypted to evade initial security checks. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

Nyx PDF Classifier malicious score 0.9865

Heuristics 4

Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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/how-to-get-free-stuf-in-roblox-game-hack PDF link annotation
- https://ciptawiratirta.com/assets/CKImages/files/robux-free-2021_GM431946152.pdfIn PDF document text
- https://ciptawiratirta.com/assets/CKImages/files/freerubux_GM431946152.pdfIn PDF document text
- https://ciptawiratirta.com/assets/CKImages/files/free-robux-no-verify_GM431946152.pdfIn PDF document text
- https://ciptawiratirta.com/assets/CKImages/files/how-to-hack-your-friends-roblox-account-2021_GM431946152.pdfIn PDF document text
- https://ciptawiratirta.com/assets/CKImages/files/how-to-make-free-robux-2021_GM431946152.pdfIn PDF document text
- https://ciptawiratirta.com/assets/CKImages/files/hacks-for-coin-master_GM406889139.pdfIn PDF document text
- https://ciptawiratirta.com/assets/CKImages/files/coin-master-free-spins-gratis_GM406889139.pdfIn PDF document text
- https://ciptawiratirta.com/assets/CKImages/files/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
- https://ciptawiratirta.com/assets/CKImages/files/coin-master-free-shield_GM406889139.pdfIn PDF document text
- https://ciptawiratirta.com/assets/CKImages/files/roblox-tracker_GM431946152.pdfIn PDF document text
- https://ciptawiratirta.com/assets/CKImages/files/get-free-tiktok-followers_GM835599320.pdfIn PDF document text
- https://ciptawiratirta.com/assets/CKImages/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
- https://ciptawiratirta.com/assets/CKImages/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
- https://ciptawiratirta.com/assets/CKImages/files/free-minecraft-alts_GM479516143.pdfIn PDF document text
- https://ciptawiratirta.com/assets/CKImages/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
- https://ciptawiratirta.com/assets/CKImages/files/is-roblox-free-on-xbox_GM431946152.pdfIn PDF document text
- https://ciptawiratirta.com/assets/CKImages/files/how-do-you-earn-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
- https://ciptawiratirta.com/assets/CKImages/files/can-you-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
- https://ciptawiratirta.com/assets/CKImages/files/free-robux-accounts_GM431946152.pdfIn PDF document text
- https://ciptawiratirta.com/assets/CKImages/files/free-minecraft-mods-for-pc_GM479516143.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_off0000513a.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x513A	25164 bytes
SHA-256: `a17dab857c9c7f0cea30c8253217c233dd24eb720a250ced1c6f1f55ad140045`
`font_01_sfnt_off00008b0f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8B0F	18356 bytes
SHA-256: `677241f9cbc8ba455e74d42ce91bbca8f779d9bffce4f3c8beb698fb32c7782a`

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