PDF malware analysis — malicious · 5730e715d419f2f0

MALICIOUS

PDF

34.3 KB Created: 2021-07-06 12:33:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-22

MD5: 572a9f30fae0b5034fe588f5f09105ab SHA-1: 71f6de958813081ff56ac1f5ffd16675593e6e32 SHA-256: 5730e715d419f2f0e4777510a2bd57f58f67c481024ebca1d12f111af24a5e37

122 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, 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 0.9980

Heuristics 5

PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK

PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
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.tw/app/479516143/wurst-115-2-game-hack PDF link annotation
- https://promidiapropaganda.com.br/modules/default/fotos/uploads/files/how-to-get-free-chest-in-coin-master_GM406889139.pdfIn PDF document text
- https://promidiapropaganda.com.br/modules/default/fotos/uploads/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
- https://promidiapropaganda.com.br/modules/default/fotos/uploads/files/how-to-get-100-robux-fast-and-free_GM431946152.pdfIn PDF document text
- https://promidiapropaganda.com.br/modules/default/fotos/uploads/files/free-robux-no-email_GM431946152.pdfIn PDF document text
- https://promidiapropaganda.com.br/modules/default/fotos/uploads/files/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
- https://promidiapropaganda.com.br/modules/default/fotos/uploads/files/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- https://promidiapropaganda.com.br/modules/default/fotos/uploads/files/coin-master-lucky-patcher-hack_GM406889139.pdfIn PDF document text
- https://promidiapropaganda.com.br/modules/default/fotos/uploads/files/coin-master-hack-no-verify_GM406889139.pdfIn PDF document text
- https://promidiapropaganda.com.br/modules/default/fotos/uploads/files/minecraft-games-free-download_GM479516143.pdfIn PDF document text
- https://promidiapropaganda.com.br/modules/default/fotos/uploads/files/how-to-get-a-free-dominus-hat-on-roblox-2021_GM431946152.pdfIn PDF document text
- https://promidiapropaganda.com.br/modules/default/fotos/uploads/files/coin-master-game-hacks_GM406889139.pdfIn PDF document text
- https://promidiapropaganda.com.br/modules/default/fotos/uploads/files/httpswwwurcouponsdealcom202103coinmasterfreespinandcoinlinkshtml_GM406889139.pdfIn PDF document text
- https://promidiapropaganda.com.br/modules/default/fotos/uploads/files/roblox-lua-programming-book-pdf-free_GM431946152.pdfIn PDF document text
- https://promidiapropaganda.com.br/modules/default/fotos/uploads/files/how-to-hack-into-other-peoples-accounts-on-roblox_GM431946152.pdfIn PDF document text
- https://promidiapropaganda.com.br/modules/default/fotos/uploads/files/cute-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
- https://promidiapropaganda.com.br/modules/default/fotos/uploads/files/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
- https://promidiapropaganda.com.br/modules/default/fotos/uploads/files/minecraft-account-hacked_GM479516143.pdfIn PDF document text
- https://promidiapropaganda.com.br/modules/default/fotos/uploads/files/free-robux-cards_GM431946152.pdfIn PDF document text
- https://promidiapropaganda.com.br/modules/default/fotos/uploads/files/coinmasterfree_GM406889139.pdfIn PDF document text
- https://promidiapropaganda.com.br/modules/default/fotos/uploads/files/roblox-vehicle-simulator-hack-client_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
`font_00_sfnt_off000031c3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x31C3	22156 bytes
SHA-256: `8f86467ed3da0851d35ca4c83a860beb3a13ef7c749b52560b0ed9409d5cc0c3`
`font_01_sfnt_off000062f1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x62F1	18440 bytes
SHA-256: `4d36fc7f60f6eefb2ae677e2271dd32deb7a6f06da798dd8a5534483c16757df`

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