PDF malware analysis — malicious · e7b4b36ada611725

MALICIOUS

PDF

35.7 KB Created: 2021-06-26 00:36:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16

MD5: a841d5a4d5965f7e299f90a2d41f394c SHA-1: 2e0280356ccf65b57a1b1a6b526fb039f7f8e852 SHA-256: e7b4b36ada611725528fe1c3704d0ca1955b0dd4705d1e2a64d0d00aa91c9033

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded URLs and a document body promoting 'free Robux' and game cheats, indicative of a phishing or scam lure. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract traffic. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 4

Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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/431946152/how-to-get-free-roebucks-in-roblox-game-hack PDF link annotation
- https://www.hearcolors.com.mx/img/blog/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/coinmaster-free-spins-link_GM406889139.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/master-hack-coin_GM406889139.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/free-codes-for-roblox-to-get-robux_GM431946152.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/minecraft-esp_GM479516143.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/how-to-hack-people-on-roblox-without-downloads_GM431946152.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/pop-slots-free-vegas-casino-slot-machine-game-coin-master_GM406889139.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/free-coin-master-gifts_GM406889139.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/free-fans-on-tiktok_GM835599320.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/free-coin-master-spins-links-2021_GM406889139.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/free-crimson-winter-scarf-roblox_GM431946152.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/coin-master-70-spin-link-today_GM406889139.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/old-roblox-accounts-for-free_GM431946152.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/roblox-prison-life-v2-02-hack_GM431946152.pdfIn PDF document text
- https://www.roblox.com/.IIn 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_off0000324a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x324A	23152 bytes
SHA-256: `6150250d5eee48f2e2ae12585885accbae7dd39f147d1de763f669845049699c`
`font_01_sfnt_off00006611.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6611	19228 bytes
SHA-256: `37f79c5bf97eb03d5d789a445bd386845bdf6e165897bd76903df78461253807`

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