PDF malware analysis — malicious · 61d966a91a91a664

MALICIOUS

PDF

45.5 KB Created: 2021-05-11 20:35:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 4a034df3729fc7c24e8949e1527c116c SHA-1: fe15754b594aede71af8570aded12445c3545c0f SHA-256: 61d966a91a91a6646a4f8b61d844ebfcf738287c0dc0360629c35885f45bdbed

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to websites offering 'free Robux' or game hacks, a common lure for phishing or malware distribution. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates this malicious intent. While no scripts were extracted, the document's structure and embedded URIs point towards a social engineering attack, likely delivered as a spearphishing attachment.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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-get-free-robux-without-download-apps-or-survey-game-hack PDF link annotation
- http://allcenterdistribuidora.com.br/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
- http://allcenterdistribuidora.com.br/files/free-robux-legit_GM431946152.pdfIn PDF document text
- http://allcenterdistribuidora.com.br/files/coin-master-hack-no-verification-2021_GM406889139.pdfIn PDF document text
- http://allcenterdistribuidora.com.br/files/minecraft-free-download-mac-full-version-2021_GM479516143.pdfIn PDF document text
- http://allcenterdistribuidora.com.br/files/freerobux-co_GM431946152.pdfIn PDF document text
- http://allcenterdistribuidora.com.br/files/wurst-mc_GM479516143.pdfIn PDF document text
- http://allcenterdistribuidora.com.br/files/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
- http://allcenterdistribuidora.com.br/files/coin-master-hack-2021-without-verification_GM406889139.pdfIn PDF document text
- http://allcenterdistribuidora.com.br/files/free-spins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
- http://allcenterdistribuidora.com.br/files/robux-redeem_GM431946152.pdfIn PDF document text
- http://allcenterdistribuidora.com.br/files/what-is-robux_GM431946152.pdfIn PDF document text
- http://allcenterdistribuidora.com.br/files/coin-master-free-spins-twitter_GM406889139.pdfIn PDF document text
- http://allcenterdistribuidora.com.br/files/moonactive-coin-master-hack_GM406889139.pdfIn PDF document text
- http://allcenterdistribuidora.com.br/files/roblox-fly-hack_GM431946152.pdfIn PDF document text
- http://allcenterdistribuidora.com.br/files/collect-free-spins-coin-master_GM406889139.pdfIn PDF document text
- http://allcenterdistribuidora.com.br/files/free-robux-mobile_GM431946152.pdfIn PDF document text
- http://allcenterdistribuidora.com.br/files/coin-master-hacks-for-iphone_GM406889139.pdfIn PDF document text
- http://allcenterdistribuidora.com.br/files/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
- http://allcenterdistribuidora.com.br/files/minecraft-noob-vs-pro-vs-hacker_GM479516143.pdfIn PDF document text
- http://allcenterdistribuidora.com.br/files/free-robux-no-human-verification-or-survey_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_003_off00004bcb.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4BCB	27660 bytes
SHA-256: `94804dc5df72f3a683947a0a8b53d1bfe88fd2af95eb9bba59f026a9664e4f58`
`font_01_sfnt_off00008abb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8ABB	19880 bytes
SHA-256: `a2325719e7076f7032f87f435cdda87ec67b0b67db20430c9492992df634e2b4`

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