PDF malware analysis — malicious · dbf5ce1bf0159f1f

MALICIOUS

PDF

38.9 KB Created: 2021-06-20 01:31:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: eabdecf230c6f8403deb4583db9d91b5 SHA-1: 30eaacaf6d95123c84236f7a2e12957ebd1617b2 SHA-256: dbf5ce1bf0159f1f7850a6e39d9113d3728bdcccf08e01699a2945b2ca062a02

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which are SEO-optimized and point to other PDFs, forming a link farm. The document body and extracted URLs suggest a lure for free Robux or game hacks, indicating a phishing or scam attempt. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

Nyx PDF Classifier malicious score 0.9985

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/free-robux-sites-that-actually-work-game-hack
- https://e-learning-mts-nurussaadah.com/__statics/gudangsoal/files/free-promo-code-generator-roblox-2021_GM431946152.pdf
- https://e-learning-mts-nurussaadah.com/__statics/gudangsoal/files/free-robux-co_GM431946152.pdf
- https://e-learning-mts-nurussaadah.com/__statics/gudangsoal/files/hacked-roblox-game_GM431946152.pdf
- https://e-learning-mts-nurussaadah.com/__statics/gudangsoal/files/coin-master-hack-2021-android-apk_GM406889139.pdf
- https://e-learning-mts-nurussaadah.com/__statics/gudangsoal/files/cool-roblox-avatar-free_GM431946152.pdf
- https://e-learning-mts-nurussaadah.com/__statics/gudangsoal/files/free-robux-generator-for-kids_GM431946152.pdf
- https://e-learning-mts-nurussaadah.com/__statics/gudangsoal/files/coin-master-hack-ios-without-verification_GM406889139.pdf
- https://e-learning-mts-nurussaadah.com/__statics/gudangsoal/files/how-do-you-get-free-robux-on-roblox-android_GM431946152.pdf
- https://e-learning-mts-nurussaadah.com/__statics/gudangsoal/files/free-roblox-gift-card-codes-2021-unused_GM431946152.pdf
- https://e-learning-mts-nurussaadah.com/__statics/gudangsoal/files/roblox-hack-sex_GM431946152.pdf
- https://e-learning-mts-nurussaadah.com/__statics/gudangsoal/files/can-you-actually-get-free-robux_GM431946152.pdf
- https://e-learning-mts-nurussaadah.com/__statics/gudangsoal/files/daily-spin-and-coin_GM406889139.pdf
- https://e-learning-mts-nurussaadah.com/__statics/gudangsoal/files/free-robux-codes-for-roblox-2021_GM431946152.pdf
- https://e-learning-mts-nurussaadah.com/__statics/gudangsoal/files/how-to-hack-someone-on-roblox_GM431946152.pdf
- https://e-learning-mts-nurussaadah.com/__statics/gudangsoal/files/roblox-free-clothes-codes_GM431946152.pdf
- https://e-learning-mts-nurussaadah.com/__statics/gudangsoal/files/i-got-hacked-on-roblox_GM431946152.pdf
- https://e-learning-mts-nurussaadah.com/__statics/gudangsoal/files/coin-master-free-spins-link-today-new-2021_GM406889139.pdf
- https://e-learning-mts-nurussaadah.com/__statics/gudangsoal/files/free-spins-coin-master-links-blogger_GM406889139.pdf
- https://e-learning-mts-nurussaadah.com/__statics/gudangsoal/files/can-u-get-free-robux_GM431946152.pdf
- https://e-learning-mts-nurussaadah.com/__statics/gudangsoal/files/coin-master-get-free-spins_GM406889139.pdf
- https://www.roblox.com/.I
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00003d7d.bin` `4d5fb987b95d4ce7930033535bbf0152ea2780ad0cc63b0e7fb838ab3fa98407`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3D7D	23128 bytes
`font_01_sfnt_off00007162.bin` `f317d0fc5c5607f5646a61f5f4ba0c077b19cf31ade7918008f586612fc6401f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7162	19728 bytes

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