PDF malware analysis — malicious · b7c84fbdd570734c

MALICIOUS

PDF

34.7 KB Created: 2021-07-03 16:20:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: e815e2cbefa8044aa629077194f0d3cb SHA-1: 12a7d7be63ad258280aa88ecc14a271a32250706 SHA-256: b7c84fbdd570734ce16eba5d3d8b2557dde2391e53129fd062862860c3511e9d

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 4

PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE

PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
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.tw/app/406889139/como-hackear-coin-master-en-espaol-game-hack PDF link annotation
- https://dolphintour.vn/images/uploadsfiles/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/114-hacks_GM479516143.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/coin-master-time-hack-ios_GM406889139.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/free-robux-discord_GM431946152.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/hacks-abd-tricks-for-roblox_GM431946152.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/free-minecraft-skin-creator_GM479516143.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/roblox-new-free-hairs_GM431946152.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/free-tiktok-likes-app_GM835599320.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/minecraft-free-ios_GM479516143.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/claimrbx-free-robux_GM431946152.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/roblox-2021-where-to-get-free-clothes_GM431946152.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/cool-avatars-on-roblox-for-free_GM431946152.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/free-robux-hacker-us_GM431946152.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/free-robux-cards_GM431946152.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/how-to-get-roblox-money_GM431946152.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/how-to-get-free-robux-without-downloading-app_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
`stream_002_off0000318c.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x318C	22636 bytes
SHA-256: `86d50305019e9e3a151559e329cf7414c024b4002d6a50086c234818005fc6d3`
`font_01_sfnt_off00006448.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6448	18516 bytes
SHA-256: `2733bbd7379f0315f5029cf6e8e3afc196c30f36adae5721920a74f68d8b4415`

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