PDF malware analysis — malicious · 56b27daa68bbc8fb

MALICIOUS

PDF

33.7 KB Created: 2021-07-06 22:57:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: 9475a7dd64e3522e9396413c2e6f1c12 SHA-1: dd2f5e2ae9bccaa667b138c30cc9673aee47ba56 SHA-256: 56b27daa68bbc8fbbd432566ba990dbd7d0eb7656687b9dbe82c9acc1eef2ea3

142 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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

Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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/431946152/roblox-hack-game-game-hack PDF link annotation
- http://www.producthubhob.com/uploaded_files/userfiles/files/free-robux-apk_GM431946152.pdfIn PDF document text
- http://www.producthubhob.com/uploaded_files/userfiles/files/how-to-hack-roblox-jailbreak-on-ipad_GM431946152.pdfIn PDF document text
- http://www.producthubhob.com/uploaded_files/userfiles/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
- http://www.producthubhob.com/uploaded_files/userfiles/files/how-to-get-2021-robux-for-free-2021_GM431946152.pdfIn PDF document text
- http://www.producthubhob.com/uploaded_files/userfiles/files/how-to-hack-roblox-free-robux_GM431946152.pdfIn PDF document text
- http://www.producthubhob.com/uploaded_files/userfiles/files/free-robux-without-verification_GM431946152.pdfIn PDF document text
- http://www.producthubhob.com/uploaded_files/userfiles/files/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
- http://www.producthubhob.com/uploaded_files/userfiles/files/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
- http://www.producthubhob.com/uploaded_files/userfiles/files/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
- http://www.producthubhob.com/uploaded_files/userfiles/files/how-to-hack-a-roblox-account-with-roblosecurity-cookie_GM431946152.pdfIn PDF document text
- http://www.producthubhob.com/uploaded_files/userfiles/files/coin-master-time-hack-ios_GM406889139.pdfIn PDF document text
- http://www.producthubhob.com/uploaded_files/userfiles/files/master-hack-coin_GM406889139.pdfIn PDF document text
- http://www.producthubhob.com/uploaded_files/userfiles/files/free-robux-promo-codes-2021-december_GM431946152.pdfIn PDF document text
- http://www.producthubhob.com/uploaded_files/userfiles/files/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
- http://www.producthubhob.com/uploaded_files/userfiles/files/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
- http://www.producthubhob.com/uploaded_files/userfiles/files/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
- http://www.producthubhob.com/uploaded_files/userfiles/files/cheat-roblox-tuto_GM431946152.pdfIn PDF document text
- http://www.producthubhob.com/uploaded_files/userfiles/files/oprewards-login_GM431946152.pdfIn PDF document text
- http://www.producthubhob.com/uploaded_files/userfiles/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
- http://www.producthubhob.com/uploaded_files/userfiles/files/hack-master-coin_GM406889139.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_off00002da2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2DA2	22188 bytes
SHA-256: `e793e3336fa18a70ffb62808e149876effdbdadedaa5400b90d83dc259cfdcbd`
`font_01_sfnt_off00005ef4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5EF4	18916 bytes
SHA-256: `d5b7e8b59fa9782264f7ee2edc2597070f93b03102e5dae9fe86d552d037f777`

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