PDF malware analysis — malicious · 81e21059ce0aa1bf

MALICIOUS

PDF

50.3 KB Created: 2021-05-31 22:55:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27

MD5: 123013a882f9f03d0b9663b8bd8ac347 SHA-1: c486b274de9ba919cbfeb912c8c0d0133a96aac5 SHA-256: 81e21059ce0aa1bf37eab3dd6e89829e86a117f121c4b2fa4ce2075427935ef2

122 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a lure for a 'free generator for card roblox robux' which redirects to a malicious URL. The presence of a fake CAPTCHA heuristic suggests an attempt to trick the user into interacting with the document, likely to download a secondary payload or navigate to a phishing site. The document's content and linked URLs strongly indicate a social engineering attack aimed at tricking users into executing malicious code or revealing sensitive information.

Machine Learning

Nyx PDF Classifier malicious score 0.9769

Heuristics 5

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.
Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA

Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
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/free-generator-for-card-roblox-robux-game-hack PDF link annotation
- https://altaviastagerace.it/wp-content/uploads/fsqm-files/roblox-free-medieval-hood_GM431946152.pdfIn PDF document text
- https://altaviastagerace.it/wp-content/uploads/fsqm-files/roblox-breaking-point-hack-script_GM431946152.pdfIn PDF document text
- https://altaviastagerace.it/wp-content/uploads/fsqm-files/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
- https://altaviastagerace.it/wp-content/uploads/fsqm-files/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
- https://altaviastagerace.it/wp-content/uploads/fsqm-files/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
- https://altaviastagerace.it/wp-content/uploads/fsqm-files/free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://altaviastagerace.it/wp-content/uploads/fsqm-files/cheat-files-robux-generator_GM431946152.pdfIn PDF document text
- https://altaviastagerace.it/wp-content/uploads/fsqm-files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
- https://altaviastagerace.it/wp-content/uploads/fsqm-files/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
- https://altaviastagerace.it/wp-content/uploads/fsqm-files/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
- https://altaviastagerace.it/wp-content/uploads/fsqm-files/minecraft-life-hacks_GM479516143.pdfIn PDF document text
- https://altaviastagerace.it/wp-content/uploads/fsqm-files/esp-roblox-hack_GM431946152.pdfIn PDF document text
- https://altaviastagerace.it/wp-content/uploads/fsqm-files/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
- https://altaviastagerace.it/wp-content/uploads/fsqm-files/roblox-vehicule-simulator-hacke_GM431946152.pdfIn PDF document text
- https://altaviastagerace.it/wp-content/uploads/fsqm-files/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
- https://altaviastagerace.it/wp-content/uploads/fsqm-files/buy-tiktok-followers-free_GM835599320.pdfIn PDF document text
- https://altaviastagerace.it/wp-content/uploads/fsqm-files/how-to-create-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
- https://altaviastagerace.it/wp-content/uploads/fsqm-files/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
- https://altaviastagerace.it/wp-content/uploads/fsqm-files/how-to-hack-high-school-life-roblox_GM431946152.pdfIn PDF document text
- https://altaviastagerace.it/wp-content/uploads/fsqm-files/free-minecraft-accounts-2021_GM479516143.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_004_off00005418.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5418	29724 bytes
SHA-256: `2b39379aa77d8cf4749ce91d20421cd0638a3d4d83243eb5a312c482520a0906`
`font_01_sfnt_off00009771.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9771	2824 bytes
SHA-256: `94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4`
`font_02_sfnt_off0000a11f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA11F	18592 bytes
SHA-256: `8d8307da24ee466d59bb4060d21e24393386d08e4fcf59044ecf11a54427195f`

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