PDF malware analysis — malicious · c4924d685ddd46e9

MALICIOUS

PDF

33.6 KB Created: 2021-06-19 00:50:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: 133e1436a1b8a7db5383e52f2dc93589 SHA-1: 2008052fdceff111542584d0ecbdb52beb1a89d3 SHA-256: c4924d685ddd46e92482b828fa30cce32938edbda5e312c733fff37374d88b0e

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 0.9824

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.co/app/431946152/roblox-lumber-tycoon-2-hailstone-hack-game-hack PDF link annotation
- http://www.alpaca-buitensport.nl/images/rblx-city-free-robux_GM431946152.pdfIn PDF document text
- http://www.alpaca-buitensport.nl/images/how-to-get-free-likes-on-tiktok_GM835599320.pdfIn PDF document text
- http://www.alpaca-buitensport.nl/images/free-roblox-animations_GM431946152.pdfIn PDF document text
- http://www.alpaca-buitensport.nl/images/descargar-hack-coin-master_GM406889139.pdfIn PDF document text
- http://www.alpaca-buitensport.nl/images/coin-master-free-stuff-links_GM406889139.pdfIn PDF document text
- http://www.alpaca-buitensport.nl/images/how-to-hack-a-account-roblox_GM431946152.pdfIn PDF document text
- http://www.alpaca-buitensport.nl/images/hack-conteur-blox-roblox_GM431946152.pdfIn PDF document text
- http://www.alpaca-buitensport.nl/images/free-roblox-glasses_GM431946152.pdfIn PDF document text
- http://www.alpaca-buitensport.nl/images/coin-master-hack-version_GM406889139.pdfIn PDF document text
- http://www.alpaca-buitensport.nl/images/free-online-minecraft-server_GM479516143.pdfIn PDF document text
- http://www.alpaca-buitensport.nl/images/robux-free-co_GM431946152.pdfIn PDF document text
- http://www.alpaca-buitensport.nl/images/free-tiktok-likes-generator_GM835599320.pdfIn PDF document text
- http://www.alpaca-buitensport.nl/images/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
- http://www.alpaca-buitensport.nl/images/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
- http://www.alpaca-buitensport.nl/images/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
- http://www.alpaca-buitensport.nl/images/free-robux-hack-generator-no-survey_GM431946152.pdfIn PDF document text
- http://www.alpaca-buitensport.nl/images/roblox-noot-noot-hack-song-roblox-id_GM431946152.pdfIn PDF document text
- http://www.alpaca-buitensport.nl/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
- http://www.alpaca-buitensport.nl/images/dashing-simulator-roblox-hack-tutorial_GM431946152.pdfIn PDF document text
- http://www.alpaca-buitensport.nl/images/free-tiktok-followers-without-verification_GM835599320.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
`font_00_sfnt_off00002b8e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2B8E	22392 bytes
SHA-256: `fe78a074d6621e47b8e5b03049280e2c11c31ff60ba3cf7216d083db11ac721b`
`font_01_sfnt_off00005d7d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5D7D	19396 bytes
SHA-256: `75ddb2b79de70b8e9d45c6737729580045c14f02a2bd315cb73496b7339f163c`

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