PDF malware analysis — malicious · d08a3ce4eb0bb130

MALICIOUS

PDF

36.2 KB Created: 2021-07-04 13:07:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24

MD5: 99d86814c7c12dffebbdf80f365438c8 SHA-1: 79290f175f6afc85ce5bb54e5bddb7062461487e SHA-256: d08a3ce4eb0bb130c27777affc33defc56d21f1462fd6d65c93682615d83ce7a

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links that redirect to malicious infrastructure, masquerading as game hacks and free spins to entice clicks. The ML classifier strongly flagged this PDF as malicious, and the presence of a visual download button further supports a malicious workflow. The primary IOC is the redirector URL, which likely leads to a further stage of infection.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 4

PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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
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/406889139/coin-master-daily-gifts-game-hack In PDF document text
- http://www.producthubhob.com/uploaded_files/userfiles/files/coin-master-latest-mod-apk-free-download_GM406889139.pdfIn PDF document text
- http://www.producthubhob.com/uploaded_files/userfiles/files/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
- http://www.producthubhob.com/uploaded_files/userfiles/files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- http://www.producthubhob.com/uploaded_files/userfiles/files/coinmaster-fan-page_GM406889139.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/roblox-hack-com_GM431946152.pdfIn PDF document text
- http://www.producthubhob.com/uploaded_files/userfiles/files/roblox-getting-hacked_GM431946152.pdfIn PDF document text
- http://www.producthubhob.com/uploaded_files/userfiles/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
- http://www.producthubhob.com/uploaded_files/userfiles/files/free-coin-master-cards_GM406889139.pdfIn PDF document text
- http://www.producthubhob.com/uploaded_files/userfiles/files/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
- http://www.producthubhob.com/uploaded_files/userfiles/files/create-vip-server-roblox-free_GM431946152.pdfIn PDF document text
- http://www.producthubhob.com/uploaded_files/userfiles/files/robux-games_GM431946152.pdfIn PDF document text
- http://www.producthubhob.com/uploaded_files/userfiles/files/minecraft-xbox-free_GM479516143.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/coin-master-free-coins-twitter_GM406889139.pdfIn PDF document text
- http://www.producthubhob.com/uploaded_files/userfiles/files/free-promocode-roblox-robux_GM431946152.pdfIn PDF document text
- http://www.producthubhob.com/uploaded_files/userfiles/files/roblox-shower-simulator-cheats-for-time_GM431946152.pdfIn PDF document text
- http://www.producthubhob.com/uploaded_files/userfiles/files/roblox-executor-free_GM431946152.pdfIn PDF document text
- http://www.producthubhob.com/uploaded_files/userfiles/files/roblox-free-cool-outfits_GM431946152.pdfIn PDF document text
- http://www.producthubhob.com/uploaded_files/userfiles/files/roblox-images_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_off00003481.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3481	23964 bytes
SHA-256: `c389ed3b2148f6675ba72963baad5c2d3c0db6fb0b66d008a843ed87ae830816`
`font_01_sfnt_off00006b09.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6B09	18256 bytes
SHA-256: `9a57ad812e157e436bcc4047eb8b4adcab852283a97400467038476e1586e01e`

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