PDF malware analysis — malicious · af49581ce49c3880

MALICIOUS

PDF

44.5 KB Created: 2021-06-07 11:19:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: 4d6f478bfc9e3e6d3b46bfdbeb28eac3 SHA-1: 18bab7a9a294cbaf01eb8d7865d7a8ce0d9de63c SHA-256: af49581ce49c388052b9c98e4940f59c1ad1131a99a41a69012e8f98a9fdaeff

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 0.9865

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 https://netcdn.tw/app/431946152/free-stuff-game-roblox-game-hack PDF link annotation
- https://uofk.edu/images/roblox-hax_GM431946152.pdfIn PDF document text
- https://uofk.edu/images/robux-free-com_GM431946152.pdfIn PDF document text
- https://uofk.edu/images/robux-giver_GM431946152.pdfIn PDF document text
- https://uofk.edu/images/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
- https://uofk.edu/images/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
- https://uofk.edu/images/cm-free-spins_GM406889139.pdfIn PDF document text
- https://uofk.edu/images/get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
- https://uofk.edu/images/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
- https://uofk.edu/images/oprewards-robux_GM431946152.pdfIn PDF document text
- https://uofk.edu/images/free-robux-images_GM431946152.pdfIn PDF document text
- https://uofk.edu/images/get-me-free-robux_GM431946152.pdfIn PDF document text
- https://uofk.edu/images/hacks-and-cheats-for-coin-master_GM406889139.pdfIn PDF document text
- https://uofk.edu/images/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
- https://uofk.edu/images/coin-master-hack-version-ios_GM406889139.pdfIn PDF document text
- https://uofk.edu/images/20-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://uofk.edu/images/minecraft-free-version_GM479516143.pdfIn PDF document text
- https://uofk.edu/images/www-free-robux_GM431946152.pdfIn PDF document text
- https://uofk.edu/images/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
- https://uofk.edu/images/free-robux-just-enter-username_GM431946152.pdfIn PDF document text
- https://uofk.edu/images/free-roblox-accessories_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_004_off00004f40.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4F40	25440 bytes
SHA-256: `7808c3d4822956aa23346126339ff40757fd5f2671285775c896ae43f795a9f9`
`font_01_sfnt_off00008a38.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8A38	18680 bytes
SHA-256: `2fb6b84bded915b46c020299e62f2c58fabe19b06cb5e73679a662f04c485e53`

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