PDF malware analysis — malicious · d1ff18fa1f2a4900

MALICIOUS

PDF

33.6 KB Created: 2021-07-01 07:49:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16

MD5: fa93d2716e7fda866a3c00db9ec82968 SHA-1: 47562f6df87d8210530de4cc4785dbd117c758cf SHA-256: d1ff18fa1f2a490040b33d8e9835d659d875d3d140da400dc20f68c39a8b9612

62 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a primary external URI pointing to a download for a game hack. The ML classifier strongly flagged this PDF as malicious, and the presence of download lures and callback phishing indicators further supports a malicious intent. The document body and extracted URLs suggest a social engineering attempt to trick users into downloading an application by promising in-game benefits.

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/levvvel-coin-master-game-hack PDF link annotation
- https://royalhelmet.com.vn/ckfinder/userfiles/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
- https://royalhelmet.com.vn/ckfinder/userfiles/files/oprewards-free-robux_GM431946152.pdfIn PDF document text
- https://royalhelmet.com.vn/ckfinder/userfiles/files/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
- https://royalhelmet.com.vn/ckfinder/userfiles/files/hack-the-game-coin-master_GM406889139.pdfIn PDF document text
- https://royalhelmet.com.vn/ckfinder/userfiles/files/how-to-play-minecraft-online-for-free_GM479516143.pdfIn PDF document text
- https://royalhelmet.com.vn/ckfinder/userfiles/files/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://royalhelmet.com.vn/ckfinder/userfiles/files/working-coin-master-hack-2021_GM406889139.pdfIn PDF document text
- https://royalhelmet.com.vn/ckfinder/userfiles/files/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- https://royalhelmet.com.vn/ckfinder/userfiles/files/but-link-says-free-robux_GM431946152.pdfIn PDF document text
- https://royalhelmet.com.vn/ckfinder/userfiles/files/free-robux-meme_GM431946152.pdfIn PDF document text
- https://royalhelmet.com.vn/ckfinder/userfiles/files/coin-master-free-spins-heaven_GM406889139.pdfIn PDF document text
- https://royalhelmet.com.vn/ckfinder/userfiles/files/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
- https://royalhelmet.com.vn/ckfinder/userfiles/files/coin-master-spin-hack_GM406889139.pdfIn PDF document text
- https://royalhelmet.com.vn/ckfinder/userfiles/files/coin-master-free-spins-glitch_GM406889139.pdfIn PDF document text
- https://royalhelmet.com.vn/ckfinder/userfiles/files/cute-free-roblox-outfits_GM431946152.pdfIn PDF document text
- https://royalhelmet.com.vn/ckfinder/userfiles/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
- https://royalhelmet.com.vn/ckfinder/userfiles/files/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
- https://royalhelmet.com.vn/ckfinder/userfiles/files/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
- https://royalhelmet.com.vn/ckfinder/userfiles/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
- https://royalhelmet.com.vn/ckfinder/userfiles/files/free-roblox-followers_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_off00003037.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3037	22092 bytes
SHA-256: `ed68977cb009457ad49b1546ebbc49a5d790017abeef792510a15e217634f454`
`font_01_sfnt_off0000613c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x613C	18024 bytes
SHA-256: `17876242a2a0dcf4775db2ff80c40ea767b9a75c5f2b8c6cb08d9d25e5860b33`

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