PDF malware analysis — malicious · ef1a7ca558e6f098

MALICIOUS

PDF

49.1 KB Created: 2021-05-19 14:47:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18

MD5: 770be82367078cb78856733c681ed8ac SHA-1: a9d3128af3ee696c6b4fa394ebd6ebcd3255b025 SHA-256: ef1a7ca558e6f098fa9b8181ca59fb44de6d07672f6aecb73740bb54f3e5be12

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 0.9228

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.xyz/app/431946152/how-to-change-your-username-on-roblox-for-free-game-hack PDF link annotation
- https://www.wearmyspex.com/uploaded_files/userfiles/files/promo-code-free-robux_GM431946152.pdfIn PDF document text
- https://www.wearmyspex.com/uploaded_files/userfiles/files/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
- https://www.wearmyspex.com/uploaded_files/userfiles/files/robux-best_GM431946152.pdfIn PDF document text
- https://www.wearmyspex.com/uploaded_files/userfiles/files/coin-master-hack-spins-android_GM406889139.pdfIn PDF document text
- https://www.wearmyspex.com/uploaded_files/userfiles/files/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
- https://www.wearmyspex.com/uploaded_files/userfiles/files/free-spin-coin-master-today_GM406889139.pdfIn PDF document text
- https://www.wearmyspex.com/uploaded_files/userfiles/files/can-i-play-minecraft-for-free_GM479516143.pdfIn PDF document text
- https://www.wearmyspex.com/uploaded_files/userfiles/files/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
- https://www.wearmyspex.com/uploaded_files/userfiles/files/coin-master-free-online-game_GM406889139.pdfIn PDF document text
- https://www.wearmyspex.com/uploaded_files/userfiles/files/is-minecraft-free-on-ps4_GM479516143.pdfIn PDF document text
- https://www.wearmyspex.com/uploaded_files/userfiles/files/40-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.wearmyspex.com/uploaded_files/userfiles/files/minecraft-survival-hacks_GM479516143.pdfIn PDF document text
- https://www.wearmyspex.com/uploaded_files/userfiles/files/best-free-minecraft-server-hosting-reddit_GM479516143.pdfIn PDF document text
- https://www.wearmyspex.com/uploaded_files/userfiles/files/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
- https://www.wearmyspex.com/uploaded_files/userfiles/files/coin-master-free-spins-that-really_GM406889139.pdfIn PDF document text
- https://www.wearmyspex.com/uploaded_files/userfiles/files/roblox-free-hair-boy_GM431946152.pdfIn PDF document text
- https://www.wearmyspex.com/uploaded_files/userfiles/files/create-minecraft-server-free_GM479516143.pdfIn PDF document text
- https://www.wearmyspex.com/uploaded_files/userfiles/files/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
- https://www.wearmyspex.com/uploaded_files/userfiles/files/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
- https://www.wearmyspex.com/uploaded_files/userfiles/files/hack-my-spins-coin-master_GM406889139.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off00004e4e.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4E4E	27144 bytes
SHA-256: `1fc89a6e60c6303bf9205cfcf084243afeb38b6afdbe5e18986997855a2ab26f`
`font_01_sfnt_off00008d19.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8D19	5696 bytes
SHA-256: `450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139`
`font_02_sfnt_off00009a2b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9A2B	19540 bytes
SHA-256: `93794ea5a6c5acfa8b9ea336c7fa02a00f4c27ab4f9922f3137d25115e5793d6`

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