PDF malware analysis — malicious · a31dfa135c636950

MALICIOUS

PDF

35.7 KB Created: 2021-06-20 09:43:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27

MD5: 649ca58824e01cb0c33d0f7c83019ecd SHA-1: d7a3ab56be25b0a694a7829dbf0ca7324464c890 SHA-256: a31dfa135c636950db6f6bea427c9fb51e4ab1b1b947bed987b45ffca0bc617d

62 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple embedded URLs, including one pointing to a suspicious executable download. The document body, though partially corrupted, references game-related cheats and hacks, aligning with a lure for downloading potentially unwanted or malicious applications. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious download lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 4

Callback phishing phone lure medium SE_CALLBACK_LURE

Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
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 http://netcdn.co/app/406889139/coins-master-game-hack PDF link annotation
- https://limebug.com/media/storage/editor/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
- https://limebug.com/media/storage/editor/files/free-roblox-girl-clothes_GM431946152.pdfIn PDF document text
- https://limebug.com/media/storage/editor/files/op-rewards-free-robux_GM431946152.pdfIn PDF document text
- https://limebug.com/media/storage/editor/files/roblox-sued_GM431946152.pdfIn PDF document text
- https://limebug.com/media/storage/editor/files/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
- https://limebug.com/media/storage/editor/files/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
- https://limebug.com/media/storage/editor/files/minecraft-ps4-code-free_GM479516143.pdfIn PDF document text
- https://limebug.com/media/storage/editor/files/free-coins-coin-master-link-today_GM406889139.pdfIn PDF document text
- https://limebug.com/media/storage/editor/files/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
- https://limebug.com/media/storage/editor/files/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
- https://limebug.com/media/storage/editor/files/coin-master-free-spins-deutsch-download-ios-link_GM406889139.pdfIn PDF document text
- https://limebug.com/media/storage/editor/files/coin-master-free-spins-app-android_GM406889139.pdfIn PDF document text
- https://limebug.com/media/storage/editor/files/free-obey-roblox_GM431946152.pdfIn PDF document text
- https://limebug.com/media/storage/editor/files/coin-master-cheats-free_GM406889139.pdfIn PDF document text
- https://limebug.com/media/storage/editor/files/coin-master-hack-apk-july-2021_GM406889139.pdfIn PDF document text
- https://limebug.com/media/storage/editor/files/minecraft-build-hacks_GM479516143.pdfIn PDF document text
- https://limebug.com/media/storage/editor/files/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
- https://limebug.com/media/storage/editor/files/how-to-get-free-robux-in-roblox-on-phone_GM431946152.pdfIn PDF document text
- https://limebug.com/media/storage/editor/files/hack-coin-master-apk-ios_GM406889139.pdfIn PDF document text
- https://limebug.com/media/storage/editor/files/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.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
`font_00_sfnt_off00003595.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3595	23316 bytes
SHA-256: `9b360142d4d1ad12ec33f63d6bccba3f67607f68e8a37b66fda9b6fee72bf4f4`
`font_01_sfnt_off00006a21.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6A21	17836 bytes
SHA-256: `0fe8d4ac684da792d1d843a150914fde269e34b53b2736f310238c05d21739c1`

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