PDF malware analysis — malicious · 40f991002be599f5

MALICIOUS

PDF

47.0 KB Created: 2021-06-10 14:29:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: 9f9b23a862e507c95a8254b57f926f69 SHA-1: 241b9c609901384de13ba1840376204fee04193d SHA-256: 40f991002be599f5a20bc6fc0c030c6c81d359dcf8bdde3ec6041e91a3d45a96

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 0.9832

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 https://netcdn.tw/app/431946152/roblox-free-games-without-downloading-game-hack PDF link annotation
- http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/free-online-games-similar-to-roblox_GM431946152.pdfIn PDF document text
- http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/roblox-hack-download-free-robux_GM431946152.pdfIn PDF document text
- http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/scaciati-mega-cheat-roblox-2021_GM431946152.pdfIn PDF document text
- http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/free-tiktok-followers_GM835599320.pdfIn PDF document text
- http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
- http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/how-to-hack-and-steal-pepoles-robux-2021_GM431946152.pdfIn PDF document text
- http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/how-to-get-free-robux-joshy_GM431946152.pdfIn PDF document text
- http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
- http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/i-think-someone-hacked-my-roblox-account_GM431946152.pdfIn PDF document text
- http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/free-roblox-hack-youtube_GM431946152.pdfIn PDF document text
- http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/glitchtale-battle-of-souls-roblox-hack-jult-31-2021_GM431946152.pdfIn PDF document text
- http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/monney-hack-for-royall-high-schol-roblox_GM431946152.pdfIn PDF document text
- http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/free-robux-code-on-roblox_GM431946152.pdfIn PDF document text
- http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/what-is-a-free-robux-code_GM431946152.pdfIn PDF document text
- http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/free-robux-group_GM431946152.pdfIn PDF document text
- http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/free-red-wings-roblox_GM431946152.pdfIn PDF document text
- http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/free-robux-no-verification-on-laptop_GM431946152.pdfIn PDF document text
- http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/minecraft-hacks_GM479516143.pdfIn PDF document text
- http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/hack-velocidad-del-juego-x3-roblox_GM431946152.pdfIn PDF document text
- http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/free-minecraft-capes_GM479516143.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_004_off000052c9.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x52C9	27508 bytes
SHA-256: `b9fab1d474116f125c7dfe71757aa5705d0990e5e8487726d7416916c5193320`
`font_01_sfnt_off00009022.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9022	19960 bytes
SHA-256: `e2b6bc106451123995d378b558821b51a1c11f940ee77ad7035456b754391a56`

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